1 | // Copyright (c) Jupyter Development Team.
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2 | // Distributed under the terms of the Modified BSD License.
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3 | /*-----------------------------------------------------------------------------
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4 | | Copyright (c) 2014-2017, PhosphorJS Contributors
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5 | |
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6 | | Distributed under the terms of the BSD 3-Clause License.
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7 | |
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8 | | The full license is in the file LICENSE, distributed with this software.
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9 | |----------------------------------------------------------------------------*/
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10 | /**
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11 | * The namespace for array-specific algorithms.
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12 | */
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13 | var ArrayExt;
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14 | (function (ArrayExt) {
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15 | /**
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16 | * Find the index of the first occurrence of a value in an array.
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17 | *
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18 | * @param array - The array-like object to search.
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19 | *
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20 | * @param value - The value to locate in the array. Values are
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21 | * compared using strict `===` equality.
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22 | *
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23 | * @param start - The index of the first element in the range to be
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24 | * searched, inclusive. The default value is `0`. Negative values
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25 | * are taken as an offset from the end of the array.
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26 | *
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27 | * @param stop - The index of the last element in the range to be
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28 | * searched, inclusive. The default value is `-1`. Negative values
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29 | * are taken as an offset from the end of the array.
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30 | *
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31 | * @returns The index of the first occurrence of the value, or `-1`
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32 | * if the value is not found.
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33 | *
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34 | * #### Notes
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35 | * If `stop < start` the search will wrap at the end of the array.
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36 | *
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37 | * #### Complexity
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38 | * Linear.
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39 | *
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40 | * #### Undefined Behavior
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41 | * A `start` or `stop` which is non-integral.
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42 | *
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43 | * #### Example
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44 | * ```typescript
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45 | * import { ArrayExt } from '@lumino/algorithm';
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46 | *
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47 | * let data = ['one', 'two', 'three', 'four', 'one'];
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48 | * ArrayExt.firstIndexOf(data, 'red'); // -1
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49 | * ArrayExt.firstIndexOf(data, 'one'); // 0
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50 | * ArrayExt.firstIndexOf(data, 'one', 1); // 4
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51 | * ArrayExt.firstIndexOf(data, 'two', 2); // -1
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52 | * ArrayExt.firstIndexOf(data, 'two', 2, 1); // 1
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53 | * ```
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54 | */
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55 | function firstIndexOf(array, value, start = 0, stop = -1) {
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56 | let n = array.length;
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57 | if (n === 0) {
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58 | return -1;
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59 | }
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60 | if (start < 0) {
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61 | start = Math.max(0, start + n);
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62 | }
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63 | else {
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64 | start = Math.min(start, n - 1);
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65 | }
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66 | if (stop < 0) {
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67 | stop = Math.max(0, stop + n);
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68 | }
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69 | else {
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70 | stop = Math.min(stop, n - 1);
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71 | }
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72 | let span;
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73 | if (stop < start) {
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74 | span = stop + 1 + (n - start);
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75 | }
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76 | else {
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77 | span = stop - start + 1;
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78 | }
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79 | for (let i = 0; i < span; ++i) {
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80 | let j = (start + i) % n;
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81 | if (array[j] === value) {
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82 | return j;
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83 | }
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84 | }
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85 | return -1;
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86 | }
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87 | ArrayExt.firstIndexOf = firstIndexOf;
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88 | /**
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89 | * Find the index of the last occurrence of a value in an array.
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90 | *
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91 | * @param array - The array-like object to search.
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92 | *
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93 | * @param value - The value to locate in the array. Values are
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94 | * compared using strict `===` equality.
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95 | *
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96 | * @param start - The index of the first element in the range to be
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97 | * searched, inclusive. The default value is `-1`. Negative values
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98 | * are taken as an offset from the end of the array.
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99 | *
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100 | * @param stop - The index of the last element in the range to be
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101 | * searched, inclusive. The default value is `0`. Negative values
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102 | * are taken as an offset from the end of the array.
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103 | *
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104 | * @returns The index of the last occurrence of the value, or `-1`
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105 | * if the value is not found.
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106 | *
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107 | * #### Notes
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108 | * If `start < stop` the search will wrap at the front of the array.
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109 | *
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110 | * #### Complexity
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111 | * Linear.
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112 | *
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113 | * #### Undefined Behavior
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114 | * A `start` or `stop` which is non-integral.
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115 | *
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116 | * #### Example
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117 | * ```typescript
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118 | * import { ArrayExt } from '@lumino/algorithm';
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119 | *
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120 | * let data = ['one', 'two', 'three', 'four', 'one'];
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121 | * ArrayExt.lastIndexOf(data, 'red'); // -1
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122 | * ArrayExt.lastIndexOf(data, 'one'); // 4
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123 | * ArrayExt.lastIndexOf(data, 'one', 1); // 0
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124 | * ArrayExt.lastIndexOf(data, 'two', 0); // -1
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125 | * ArrayExt.lastIndexOf(data, 'two', 0, 1); // 1
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126 | * ```
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127 | */
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128 | function lastIndexOf(array, value, start = -1, stop = 0) {
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129 | let n = array.length;
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130 | if (n === 0) {
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131 | return -1;
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132 | }
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133 | if (start < 0) {
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134 | start = Math.max(0, start + n);
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135 | }
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136 | else {
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137 | start = Math.min(start, n - 1);
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138 | }
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139 | if (stop < 0) {
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140 | stop = Math.max(0, stop + n);
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141 | }
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142 | else {
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143 | stop = Math.min(stop, n - 1);
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144 | }
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145 | let span;
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146 | if (start < stop) {
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147 | span = start + 1 + (n - stop);
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148 | }
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149 | else {
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150 | span = start - stop + 1;
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151 | }
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152 | for (let i = 0; i < span; ++i) {
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153 | let j = (start - i + n) % n;
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154 | if (array[j] === value) {
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155 | return j;
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156 | }
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157 | }
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158 | return -1;
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159 | }
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160 | ArrayExt.lastIndexOf = lastIndexOf;
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161 | /**
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162 | * Find the index of the first value which matches a predicate.
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163 | *
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164 | * @param array - The array-like object to search.
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165 | *
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166 | * @param fn - The predicate function to apply to the values.
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167 | *
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168 | * @param start - The index of the first element in the range to be
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169 | * searched, inclusive. The default value is `0`. Negative values
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170 | * are taken as an offset from the end of the array.
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171 | *
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172 | * @param stop - The index of the last element in the range to be
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173 | * searched, inclusive. The default value is `-1`. Negative values
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174 | * are taken as an offset from the end of the array.
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175 | *
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176 | * @returns The index of the first matching value, or `-1` if no
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177 | * matching value is found.
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178 | *
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179 | * #### Notes
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180 | * If `stop < start` the search will wrap at the end of the array.
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181 | *
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182 | * #### Complexity
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183 | * Linear.
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184 | *
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185 | * #### Undefined Behavior
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186 | * A `start` or `stop` which is non-integral.
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187 | *
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188 | * Modifying the length of the array while searching.
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189 | *
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190 | * #### Example
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191 | * ```typescript
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192 | * import { ArrayExt } from '@lumino/algorithm';
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193 | *
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194 | * function isEven(value: number): boolean {
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195 | * return value % 2 === 0;
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196 | * }
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197 | *
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198 | * let data = [1, 2, 3, 4, 3, 2, 1];
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199 | * ArrayExt.findFirstIndex(data, isEven); // 1
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200 | * ArrayExt.findFirstIndex(data, isEven, 4); // 5
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201 | * ArrayExt.findFirstIndex(data, isEven, 6); // -1
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202 | * ArrayExt.findFirstIndex(data, isEven, 6, 5); // 1
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203 | * ```
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204 | */
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205 | function findFirstIndex(array, fn, start = 0, stop = -1) {
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206 | let n = array.length;
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207 | if (n === 0) {
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208 | return -1;
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209 | }
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210 | if (start < 0) {
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211 | start = Math.max(0, start + n);
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212 | }
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213 | else {
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214 | start = Math.min(start, n - 1);
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215 | }
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216 | if (stop < 0) {
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217 | stop = Math.max(0, stop + n);
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218 | }
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219 | else {
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220 | stop = Math.min(stop, n - 1);
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221 | }
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222 | let span;
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223 | if (stop < start) {
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224 | span = stop + 1 + (n - start);
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225 | }
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226 | else {
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227 | span = stop - start + 1;
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228 | }
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229 | for (let i = 0; i < span; ++i) {
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230 | let j = (start + i) % n;
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231 | if (fn(array[j], j)) {
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232 | return j;
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233 | }
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234 | }
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235 | return -1;
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236 | }
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237 | ArrayExt.findFirstIndex = findFirstIndex;
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238 | /**
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239 | * Find the index of the last value which matches a predicate.
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240 | *
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241 | * @param object - The array-like object to search.
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242 | *
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243 | * @param fn - The predicate function to apply to the values.
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244 | *
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245 | * @param start - The index of the first element in the range to be
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246 | * searched, inclusive. The default value is `-1`. Negative values
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247 | * are taken as an offset from the end of the array.
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248 | *
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249 | * @param stop - The index of the last element in the range to be
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250 | * searched, inclusive. The default value is `0`. Negative values
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251 | * are taken as an offset from the end of the array.
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252 | *
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253 | * @returns The index of the last matching value, or `-1` if no
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254 | * matching value is found.
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255 | *
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256 | * #### Notes
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257 | * If `start < stop` the search will wrap at the front of the array.
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258 | *
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259 | * #### Complexity
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260 | * Linear.
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261 | *
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262 | * #### Undefined Behavior
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263 | * A `start` or `stop` which is non-integral.
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264 | *
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265 | * Modifying the length of the array while searching.
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266 | *
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267 | * #### Example
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268 | * ```typescript
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269 | * import { ArrayExt } from '@lumino/algorithm';
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270 | *
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271 | * function isEven(value: number): boolean {
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272 | * return value % 2 === 0;
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273 | * }
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274 | *
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275 | * let data = [1, 2, 3, 4, 3, 2, 1];
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276 | * ArrayExt.findLastIndex(data, isEven); // 5
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277 | * ArrayExt.findLastIndex(data, isEven, 4); // 3
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278 | * ArrayExt.findLastIndex(data, isEven, 0); // -1
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279 | * ArrayExt.findLastIndex(data, isEven, 0, 1); // 5
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280 | * ```
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281 | */
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282 | function findLastIndex(array, fn, start = -1, stop = 0) {
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283 | let n = array.length;
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284 | if (n === 0) {
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285 | return -1;
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286 | }
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287 | if (start < 0) {
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288 | start = Math.max(0, start + n);
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289 | }
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290 | else {
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291 | start = Math.min(start, n - 1);
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292 | }
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293 | if (stop < 0) {
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294 | stop = Math.max(0, stop + n);
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295 | }
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296 | else {
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297 | stop = Math.min(stop, n - 1);
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298 | }
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299 | let d;
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300 | if (start < stop) {
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301 | d = start + 1 + (n - stop);
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302 | }
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303 | else {
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304 | d = start - stop + 1;
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305 | }
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306 | for (let i = 0; i < d; ++i) {
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307 | let j = (start - i + n) % n;
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308 | if (fn(array[j], j)) {
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309 | return j;
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310 | }
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311 | }
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312 | return -1;
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313 | }
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314 | ArrayExt.findLastIndex = findLastIndex;
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315 | /**
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316 | * Find the first value which matches a predicate.
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317 | *
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318 | * @param array - The array-like object to search.
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319 | *
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320 | * @param fn - The predicate function to apply to the values.
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321 | *
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322 | * @param start - The index of the first element in the range to be
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323 | * searched, inclusive. The default value is `0`. Negative values
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324 | * are taken as an offset from the end of the array.
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325 | *
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326 | * @param stop - The index of the last element in the range to be
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327 | * searched, inclusive. The default value is `-1`. Negative values
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328 | * are taken as an offset from the end of the array.
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329 | *
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330 | * @returns The first matching value, or `undefined` if no matching
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331 | * value is found.
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332 | *
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333 | * #### Notes
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334 | * If `stop < start` the search will wrap at the end of the array.
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335 | *
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336 | * #### Complexity
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337 | * Linear.
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338 | *
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339 | * #### Undefined Behavior
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340 | * A `start` or `stop` which is non-integral.
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341 | *
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342 | * Modifying the length of the array while searching.
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343 | *
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344 | * #### Example
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345 | * ```typescript
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346 | * import { ArrayExt } from '@lumino/algorithm';
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347 | *
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348 | * function isEven(value: number): boolean {
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349 | * return value % 2 === 0;
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350 | * }
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351 | *
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352 | * let data = [1, 2, 3, 4, 3, 2, 1];
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353 | * ArrayExt.findFirstValue(data, isEven); // 2
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354 | * ArrayExt.findFirstValue(data, isEven, 2); // 4
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355 | * ArrayExt.findFirstValue(data, isEven, 6); // undefined
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356 | * ArrayExt.findFirstValue(data, isEven, 6, 5); // 2
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357 | * ```
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358 | */
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359 | function findFirstValue(array, fn, start = 0, stop = -1) {
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360 | let index = findFirstIndex(array, fn, start, stop);
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361 | return index !== -1 ? array[index] : undefined;
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362 | }
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363 | ArrayExt.findFirstValue = findFirstValue;
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364 | /**
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365 | * Find the last value which matches a predicate.
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366 | *
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367 | * @param object - The array-like object to search.
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368 | *
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369 | * @param fn - The predicate function to apply to the values.
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370 | *
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371 | * @param start - The index of the first element in the range to be
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372 | * searched, inclusive. The default value is `-1`. Negative values
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373 | * are taken as an offset from the end of the array.
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374 | *
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375 | * @param stop - The index of the last element in the range to be
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376 | * searched, inclusive. The default value is `0`. Negative values
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377 | * are taken as an offset from the end of the array.
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378 | *
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379 | * @returns The last matching value, or `undefined` if no matching
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380 | * value is found.
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381 | *
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382 | * #### Notes
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383 | * If `start < stop` the search will wrap at the front of the array.
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384 | *
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385 | * #### Complexity
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386 | * Linear.
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387 | *
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388 | * #### Undefined Behavior
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389 | * A `start` or `stop` which is non-integral.
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390 | *
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391 | * Modifying the length of the array while searching.
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392 | *
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393 | * #### Example
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394 | * ```typescript
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395 | * import { ArrayExt } from '@lumino/algorithm';
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396 | *
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397 | * function isEven(value: number): boolean {
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398 | * return value % 2 === 0;
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399 | * }
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400 | *
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401 | * let data = [1, 2, 3, 4, 3, 2, 1];
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402 | * ArrayExt.findLastValue(data, isEven); // 2
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403 | * ArrayExt.findLastValue(data, isEven, 4); // 4
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404 | * ArrayExt.findLastValue(data, isEven, 0); // undefined
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405 | * ArrayExt.findLastValue(data, isEven, 0, 1); // 2
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406 | * ```
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407 | */
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408 | function findLastValue(array, fn, start = -1, stop = 0) {
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409 | let index = findLastIndex(array, fn, start, stop);
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410 | return index !== -1 ? array[index] : undefined;
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411 | }
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412 | ArrayExt.findLastValue = findLastValue;
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413 | /**
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414 | * Find the index of the first element which compares `>=` to a value.
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415 | *
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416 | * @param array - The sorted array-like object to search.
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417 | *
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418 | * @param value - The value to locate in the array.
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419 | *
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420 | * @param fn - The 3-way comparison function to apply to the values.
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421 | * It should return `< 0` if an element is less than a value, `0` if
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422 | * an element is equal to a value, or `> 0` if an element is greater
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423 | * than a value.
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424 | *
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425 | * @param start - The index of the first element in the range to be
|
426 | * searched, inclusive. The default value is `0`. Negative values
|
427 | * are taken as an offset from the end of the array.
|
428 | *
|
429 | * @param stop - The index of the last element in the range to be
|
430 | * searched, inclusive. The default value is `-1`. Negative values
|
431 | * are taken as an offset from the end of the array.
|
432 | *
|
433 | * @returns The index of the first element which compares `>=` to the
|
434 | * value, or `length` if there is no such element. If the computed
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435 | * index for `stop` is less than `start`, then the computed index
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436 | * for `start` is returned.
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437 | *
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438 | * #### Notes
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439 | * The array must already be sorted in ascending order according to
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440 | * the comparison function.
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441 | *
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442 | * #### Complexity
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443 | * Logarithmic.
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444 | *
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445 | * #### Undefined Behavior
|
446 | * Searching a range which is not sorted in ascending order.
|
447 | *
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448 | * A `start` or `stop` which is non-integral.
|
449 | *
|
450 | * Modifying the length of the array while searching.
|
451 | *
|
452 | * #### Example
|
453 | * ```typescript
|
454 | * import { ArrayExt } from '@lumino/algorithm';
|
455 | *
|
456 | * function numberCmp(a: number, b: number): number {
|
457 | * return a - b;
|
458 | * }
|
459 | *
|
460 | * let data = [0, 3, 4, 7, 7, 9];
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461 | * ArrayExt.lowerBound(data, 0, numberCmp); // 0
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462 | * ArrayExt.lowerBound(data, 6, numberCmp); // 3
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463 | * ArrayExt.lowerBound(data, 7, numberCmp); // 3
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464 | * ArrayExt.lowerBound(data, -1, numberCmp); // 0
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465 | * ArrayExt.lowerBound(data, 10, numberCmp); // 6
|
466 | * ```
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467 | */
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468 | function lowerBound(array, value, fn, start = 0, stop = -1) {
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469 | let n = array.length;
|
470 | if (n === 0) {
|
471 | return 0;
|
472 | }
|
473 | if (start < 0) {
|
474 | start = Math.max(0, start + n);
|
475 | }
|
476 | else {
|
477 | start = Math.min(start, n - 1);
|
478 | }
|
479 | if (stop < 0) {
|
480 | stop = Math.max(0, stop + n);
|
481 | }
|
482 | else {
|
483 | stop = Math.min(stop, n - 1);
|
484 | }
|
485 | let begin = start;
|
486 | let span = stop - start + 1;
|
487 | while (span > 0) {
|
488 | let half = span >> 1;
|
489 | let middle = begin + half;
|
490 | if (fn(array[middle], value) < 0) {
|
491 | begin = middle + 1;
|
492 | span -= half + 1;
|
493 | }
|
494 | else {
|
495 | span = half;
|
496 | }
|
497 | }
|
498 | return begin;
|
499 | }
|
500 | ArrayExt.lowerBound = lowerBound;
|
501 | /**
|
502 | * Find the index of the first element which compares `>` than a value.
|
503 | *
|
504 | * @param array - The sorted array-like object to search.
|
505 | *
|
506 | * @param value - The value to locate in the array.
|
507 | *
|
508 | * @param fn - The 3-way comparison function to apply to the values.
|
509 | * It should return `< 0` if an element is less than a value, `0` if
|
510 | * an element is equal to a value, or `> 0` if an element is greater
|
511 | * than a value.
|
512 | *
|
513 | * @param start - The index of the first element in the range to be
|
514 | * searched, inclusive. The default value is `0`. Negative values
|
515 | * are taken as an offset from the end of the array.
|
516 | *
|
517 | * @param stop - The index of the last element in the range to be
|
518 | * searched, inclusive. The default value is `-1`. Negative values
|
519 | * are taken as an offset from the end of the array.
|
520 | *
|
521 | * @returns The index of the first element which compares `>` than the
|
522 | * value, or `length` if there is no such element. If the computed
|
523 | * index for `stop` is less than `start`, then the computed index
|
524 | * for `start` is returned.
|
525 | *
|
526 | * #### Notes
|
527 | * The array must already be sorted in ascending order according to
|
528 | * the comparison function.
|
529 | *
|
530 | * #### Complexity
|
531 | * Logarithmic.
|
532 | *
|
533 | * #### Undefined Behavior
|
534 | * Searching a range which is not sorted in ascending order.
|
535 | *
|
536 | * A `start` or `stop` which is non-integral.
|
537 | *
|
538 | * Modifying the length of the array while searching.
|
539 | *
|
540 | * #### Example
|
541 | * ```typescript
|
542 | * import { ArrayExt } from '@lumino/algorithm';
|
543 | *
|
544 | * function numberCmp(a: number, b: number): number {
|
545 | * return a - b;
|
546 | * }
|
547 | *
|
548 | * let data = [0, 3, 4, 7, 7, 9];
|
549 | * ArrayExt.upperBound(data, 0, numberCmp); // 1
|
550 | * ArrayExt.upperBound(data, 6, numberCmp); // 3
|
551 | * ArrayExt.upperBound(data, 7, numberCmp); // 5
|
552 | * ArrayExt.upperBound(data, -1, numberCmp); // 0
|
553 | * ArrayExt.upperBound(data, 10, numberCmp); // 6
|
554 | * ```
|
555 | */
|
556 | function upperBound(array, value, fn, start = 0, stop = -1) {
|
557 | let n = array.length;
|
558 | if (n === 0) {
|
559 | return 0;
|
560 | }
|
561 | if (start < 0) {
|
562 | start = Math.max(0, start + n);
|
563 | }
|
564 | else {
|
565 | start = Math.min(start, n - 1);
|
566 | }
|
567 | if (stop < 0) {
|
568 | stop = Math.max(0, stop + n);
|
569 | }
|
570 | else {
|
571 | stop = Math.min(stop, n - 1);
|
572 | }
|
573 | let begin = start;
|
574 | let span = stop - start + 1;
|
575 | while (span > 0) {
|
576 | let half = span >> 1;
|
577 | let middle = begin + half;
|
578 | if (fn(array[middle], value) > 0) {
|
579 | span = half;
|
580 | }
|
581 | else {
|
582 | begin = middle + 1;
|
583 | span -= half + 1;
|
584 | }
|
585 | }
|
586 | return begin;
|
587 | }
|
588 | ArrayExt.upperBound = upperBound;
|
589 | /**
|
590 | * Test whether two arrays are shallowly equal.
|
591 | *
|
592 | * @param a - The first array-like object to compare.
|
593 | *
|
594 | * @param b - The second array-like object to compare.
|
595 | *
|
596 | * @param fn - The comparison function to apply to the elements. It
|
597 | * should return `true` if the elements are "equal". The default
|
598 | * compares elements using strict `===` equality.
|
599 | *
|
600 | * @returns Whether the two arrays are shallowly equal.
|
601 | *
|
602 | * #### Complexity
|
603 | * Linear.
|
604 | *
|
605 | * #### Undefined Behavior
|
606 | * Modifying the length of the arrays while comparing.
|
607 | *
|
608 | * #### Example
|
609 | * ```typescript
|
610 | * import { ArrayExt } from '@lumino/algorithm';
|
611 | *
|
612 | * let d1 = [0, 3, 4, 7, 7, 9];
|
613 | * let d2 = [0, 3, 4, 7, 7, 9];
|
614 | * let d3 = [42];
|
615 | * ArrayExt.shallowEqual(d1, d2); // true
|
616 | * ArrayExt.shallowEqual(d2, d3); // false
|
617 | * ```
|
618 | */
|
619 | function shallowEqual(a, b, fn) {
|
620 | // Check for object identity first.
|
621 | if (a === b) {
|
622 | return true;
|
623 | }
|
624 | // Bail early if the lengths are different.
|
625 | if (a.length !== b.length) {
|
626 | return false;
|
627 | }
|
628 | // Compare each element for equality.
|
629 | for (let i = 0, n = a.length; i < n; ++i) {
|
630 | if (fn ? !fn(a[i], b[i]) : a[i] !== b[i]) {
|
631 | return false;
|
632 | }
|
633 | }
|
634 | // The array are shallowly equal.
|
635 | return true;
|
636 | }
|
637 | ArrayExt.shallowEqual = shallowEqual;
|
638 | /**
|
639 | * Create a slice of an array subject to an optional step.
|
640 | *
|
641 | * @param array - The array-like object of interest.
|
642 | *
|
643 | * @param options - The options for configuring the slice.
|
644 | *
|
645 | * @returns A new array with the specified values.
|
646 | *
|
647 | * @throws An exception if the slice `step` is `0`.
|
648 | *
|
649 | * #### Complexity
|
650 | * Linear.
|
651 | *
|
652 | * #### Undefined Behavior
|
653 | * A `start`, `stop`, or `step` which is non-integral.
|
654 | *
|
655 | * #### Example
|
656 | * ```typescript
|
657 | * import { ArrayExt } from '@lumino/algorithm';
|
658 | *
|
659 | * let data = [0, 3, 4, 7, 7, 9];
|
660 | * ArrayExt.slice(data); // [0, 3, 4, 7, 7, 9]
|
661 | * ArrayExt.slice(data, { start: 2 }); // [4, 7, 7, 9]
|
662 | * ArrayExt.slice(data, { start: 0, stop: 4 }); // [0, 3, 4, 7]
|
663 | * ArrayExt.slice(data, { step: 2 }); // [0, 4, 7]
|
664 | * ArrayExt.slice(data, { step: -1 }); // [9, 7, 7, 4, 3, 0]
|
665 | * ```
|
666 | */
|
667 | function slice(array, options = {}) {
|
668 | // Extract the options.
|
669 | let { start, stop, step } = options;
|
670 | // Set up the `step` value.
|
671 | if (step === undefined) {
|
672 | step = 1;
|
673 | }
|
674 | // Validate the step size.
|
675 | if (step === 0) {
|
676 | throw new Error('Slice `step` cannot be zero.');
|
677 | }
|
678 | // Look up the length of the array.
|
679 | let n = array.length;
|
680 | // Set up the `start` value.
|
681 | if (start === undefined) {
|
682 | start = step < 0 ? n - 1 : 0;
|
683 | }
|
684 | else if (start < 0) {
|
685 | start = Math.max(start + n, step < 0 ? -1 : 0);
|
686 | }
|
687 | else if (start >= n) {
|
688 | start = step < 0 ? n - 1 : n;
|
689 | }
|
690 | // Set up the `stop` value.
|
691 | if (stop === undefined) {
|
692 | stop = step < 0 ? -1 : n;
|
693 | }
|
694 | else if (stop < 0) {
|
695 | stop = Math.max(stop + n, step < 0 ? -1 : 0);
|
696 | }
|
697 | else if (stop >= n) {
|
698 | stop = step < 0 ? n - 1 : n;
|
699 | }
|
700 | // Compute the slice length.
|
701 | let length;
|
702 | if ((step < 0 && stop >= start) || (step > 0 && start >= stop)) {
|
703 | length = 0;
|
704 | }
|
705 | else if (step < 0) {
|
706 | length = Math.floor((stop - start + 1) / step + 1);
|
707 | }
|
708 | else {
|
709 | length = Math.floor((stop - start - 1) / step + 1);
|
710 | }
|
711 | // Compute the sliced result.
|
712 | let result = [];
|
713 | for (let i = 0; i < length; ++i) {
|
714 | result[i] = array[start + i * step];
|
715 | }
|
716 | // Return the result.
|
717 | return result;
|
718 | }
|
719 | ArrayExt.slice = slice;
|
720 | /**
|
721 | * Move an element in an array from one index to another.
|
722 | *
|
723 | * @param array - The mutable array-like object of interest.
|
724 | *
|
725 | * @param fromIndex - The index of the element to move. Negative
|
726 | * values are taken as an offset from the end of the array.
|
727 | *
|
728 | * @param toIndex - The target index of the element. Negative
|
729 | * values are taken as an offset from the end of the array.
|
730 | *
|
731 | * #### Complexity
|
732 | * Linear.
|
733 | *
|
734 | * #### Undefined Behavior
|
735 | * A `fromIndex` or `toIndex` which is non-integral.
|
736 | *
|
737 | * #### Example
|
738 | * ```typescript
|
739 | * import { ArrayExt } from from '@lumino/algorithm';
|
740 | *
|
741 | * let data = [0, 1, 2, 3, 4];
|
742 | * ArrayExt.move(data, 1, 2); // [0, 2, 1, 3, 4]
|
743 | * ArrayExt.move(data, 4, 2); // [0, 2, 4, 1, 3]
|
744 | * ```
|
745 | */
|
746 | function move(array, fromIndex, toIndex) {
|
747 | let n = array.length;
|
748 | if (n <= 1) {
|
749 | return;
|
750 | }
|
751 | if (fromIndex < 0) {
|
752 | fromIndex = Math.max(0, fromIndex + n);
|
753 | }
|
754 | else {
|
755 | fromIndex = Math.min(fromIndex, n - 1);
|
756 | }
|
757 | if (toIndex < 0) {
|
758 | toIndex = Math.max(0, toIndex + n);
|
759 | }
|
760 | else {
|
761 | toIndex = Math.min(toIndex, n - 1);
|
762 | }
|
763 | if (fromIndex === toIndex) {
|
764 | return;
|
765 | }
|
766 | let value = array[fromIndex];
|
767 | let d = fromIndex < toIndex ? 1 : -1;
|
768 | for (let i = fromIndex; i !== toIndex; i += d) {
|
769 | array[i] = array[i + d];
|
770 | }
|
771 | array[toIndex] = value;
|
772 | }
|
773 | ArrayExt.move = move;
|
774 | /**
|
775 | * Reverse an array in-place.
|
776 | *
|
777 | * @param array - The mutable array-like object of interest.
|
778 | *
|
779 | * @param start - The index of the first element in the range to be
|
780 | * reversed, inclusive. The default value is `0`. Negative values
|
781 | * are taken as an offset from the end of the array.
|
782 | *
|
783 | * @param stop - The index of the last element in the range to be
|
784 | * reversed, inclusive. The default value is `-1`. Negative values
|
785 | * are taken as an offset from the end of the array.
|
786 | *
|
787 | * #### Complexity
|
788 | * Linear.
|
789 | *
|
790 | * #### Undefined Behavior
|
791 | * A `start` or `stop` index which is non-integral.
|
792 | *
|
793 | * #### Example
|
794 | * ```typescript
|
795 | * import { ArrayExt } from '@lumino/algorithm';
|
796 | *
|
797 | * let data = [0, 1, 2, 3, 4];
|
798 | * ArrayExt.reverse(data, 1, 3); // [0, 3, 2, 1, 4]
|
799 | * ArrayExt.reverse(data, 3); // [0, 3, 2, 4, 1]
|
800 | * ArrayExt.reverse(data); // [1, 4, 2, 3, 0]
|
801 | * ```
|
802 | */
|
803 | function reverse(array, start = 0, stop = -1) {
|
804 | let n = array.length;
|
805 | if (n <= 1) {
|
806 | return;
|
807 | }
|
808 | if (start < 0) {
|
809 | start = Math.max(0, start + n);
|
810 | }
|
811 | else {
|
812 | start = Math.min(start, n - 1);
|
813 | }
|
814 | if (stop < 0) {
|
815 | stop = Math.max(0, stop + n);
|
816 | }
|
817 | else {
|
818 | stop = Math.min(stop, n - 1);
|
819 | }
|
820 | while (start < stop) {
|
821 | let a = array[start];
|
822 | let b = array[stop];
|
823 | array[start++] = b;
|
824 | array[stop--] = a;
|
825 | }
|
826 | }
|
827 | ArrayExt.reverse = reverse;
|
828 | /**
|
829 | * Rotate the elements of an array in-place.
|
830 | *
|
831 | * @param array - The mutable array-like object of interest.
|
832 | *
|
833 | * @param delta - The amount of rotation to apply to the elements. A
|
834 | * positive value will rotate the elements to the left. A negative
|
835 | * value will rotate the elements to the right.
|
836 | *
|
837 | * @param start - The index of the first element in the range to be
|
838 | * rotated, inclusive. The default value is `0`. Negative values
|
839 | * are taken as an offset from the end of the array.
|
840 | *
|
841 | * @param stop - The index of the last element in the range to be
|
842 | * rotated, inclusive. The default value is `-1`. Negative values
|
843 | * are taken as an offset from the end of the array.
|
844 | *
|
845 | * #### Complexity
|
846 | * Linear.
|
847 | *
|
848 | * #### Undefined Behavior
|
849 | * A `delta`, `start`, or `stop` which is non-integral.
|
850 | *
|
851 | * #### Example
|
852 | * ```typescript
|
853 | * import { ArrayExt } from '@lumino/algorithm';
|
854 | *
|
855 | * let data = [0, 1, 2, 3, 4];
|
856 | * ArrayExt.rotate(data, 2); // [2, 3, 4, 0, 1]
|
857 | * ArrayExt.rotate(data, -2); // [0, 1, 2, 3, 4]
|
858 | * ArrayExt.rotate(data, 10); // [0, 1, 2, 3, 4]
|
859 | * ArrayExt.rotate(data, 9); // [4, 0, 1, 2, 3]
|
860 | * ArrayExt.rotate(data, 2, 1, 3); // [4, 2, 0, 1, 3]
|
861 | * ```
|
862 | */
|
863 | function rotate(array, delta, start = 0, stop = -1) {
|
864 | let n = array.length;
|
865 | if (n <= 1) {
|
866 | return;
|
867 | }
|
868 | if (start < 0) {
|
869 | start = Math.max(0, start + n);
|
870 | }
|
871 | else {
|
872 | start = Math.min(start, n - 1);
|
873 | }
|
874 | if (stop < 0) {
|
875 | stop = Math.max(0, stop + n);
|
876 | }
|
877 | else {
|
878 | stop = Math.min(stop, n - 1);
|
879 | }
|
880 | if (start >= stop) {
|
881 | return;
|
882 | }
|
883 | let length = stop - start + 1;
|
884 | if (delta > 0) {
|
885 | delta = delta % length;
|
886 | }
|
887 | else if (delta < 0) {
|
888 | delta = ((delta % length) + length) % length;
|
889 | }
|
890 | if (delta === 0) {
|
891 | return;
|
892 | }
|
893 | let pivot = start + delta;
|
894 | reverse(array, start, pivot - 1);
|
895 | reverse(array, pivot, stop);
|
896 | reverse(array, start, stop);
|
897 | }
|
898 | ArrayExt.rotate = rotate;
|
899 | /**
|
900 | * Fill an array with a static value.
|
901 | *
|
902 | * @param array - The mutable array-like object to fill.
|
903 | *
|
904 | * @param value - The static value to use to fill the array.
|
905 | *
|
906 | * @param start - The index of the first element in the range to be
|
907 | * filled, inclusive. The default value is `0`. Negative values
|
908 | * are taken as an offset from the end of the array.
|
909 | *
|
910 | * @param stop - The index of the last element in the range to be
|
911 | * filled, inclusive. The default value is `-1`. Negative values
|
912 | * are taken as an offset from the end of the array.
|
913 | *
|
914 | * #### Notes
|
915 | * If `stop < start` the fill will wrap at the end of the array.
|
916 | *
|
917 | * #### Complexity
|
918 | * Linear.
|
919 | *
|
920 | * #### Undefined Behavior
|
921 | * A `start` or `stop` which is non-integral.
|
922 | *
|
923 | * #### Example
|
924 | * ```typescript
|
925 | * import { ArrayExt } from '@lumino/algorithm';
|
926 | *
|
927 | * let data = ['one', 'two', 'three', 'four'];
|
928 | * ArrayExt.fill(data, 'r'); // ['r', 'r', 'r', 'r']
|
929 | * ArrayExt.fill(data, 'g', 1); // ['r', 'g', 'g', 'g']
|
930 | * ArrayExt.fill(data, 'b', 2, 3); // ['r', 'g', 'b', 'b']
|
931 | * ArrayExt.fill(data, 'z', 3, 1); // ['z', 'z', 'b', 'z']
|
932 | * ```
|
933 | */
|
934 | function fill(array, value, start = 0, stop = -1) {
|
935 | let n = array.length;
|
936 | if (n === 0) {
|
937 | return;
|
938 | }
|
939 | if (start < 0) {
|
940 | start = Math.max(0, start + n);
|
941 | }
|
942 | else {
|
943 | start = Math.min(start, n - 1);
|
944 | }
|
945 | if (stop < 0) {
|
946 | stop = Math.max(0, stop + n);
|
947 | }
|
948 | else {
|
949 | stop = Math.min(stop, n - 1);
|
950 | }
|
951 | let span;
|
952 | if (stop < start) {
|
953 | span = stop + 1 + (n - start);
|
954 | }
|
955 | else {
|
956 | span = stop - start + 1;
|
957 | }
|
958 | for (let i = 0; i < span; ++i) {
|
959 | array[(start + i) % n] = value;
|
960 | }
|
961 | }
|
962 | ArrayExt.fill = fill;
|
963 | /**
|
964 | * Insert a value into an array at a specific index.
|
965 | *
|
966 | * @param array - The array of interest.
|
967 | *
|
968 | * @param index - The index at which to insert the value. Negative
|
969 | * values are taken as an offset from the end of the array.
|
970 | *
|
971 | * @param value - The value to set at the specified index.
|
972 | *
|
973 | * #### Complexity
|
974 | * Linear.
|
975 | *
|
976 | * #### Undefined Behavior
|
977 | * An `index` which is non-integral.
|
978 | *
|
979 | * #### Example
|
980 | * ```typescript
|
981 | * import { ArrayExt } from '@lumino/algorithm';
|
982 | *
|
983 | * let data = [0, 1, 2];
|
984 | * ArrayExt.insert(data, 0, -1); // [-1, 0, 1, 2]
|
985 | * ArrayExt.insert(data, 2, 12); // [-1, 0, 12, 1, 2]
|
986 | * ArrayExt.insert(data, -1, 7); // [-1, 0, 12, 1, 7, 2]
|
987 | * ArrayExt.insert(data, 6, 19); // [-1, 0, 12, 1, 7, 2, 19]
|
988 | * ```
|
989 | */
|
990 | function insert(array, index, value) {
|
991 | let n = array.length;
|
992 | if (index < 0) {
|
993 | index = Math.max(0, index + n);
|
994 | }
|
995 | else {
|
996 | index = Math.min(index, n);
|
997 | }
|
998 | for (let i = n; i > index; --i) {
|
999 | array[i] = array[i - 1];
|
1000 | }
|
1001 | array[index] = value;
|
1002 | }
|
1003 | ArrayExt.insert = insert;
|
1004 | /**
|
1005 | * Remove and return a value at a specific index in an array.
|
1006 | *
|
1007 | * @param array - The array of interest.
|
1008 | *
|
1009 | * @param index - The index of the value to remove. Negative values
|
1010 | * are taken as an offset from the end of the array.
|
1011 | *
|
1012 | * @returns The value at the specified index, or `undefined` if the
|
1013 | * index is out of range.
|
1014 | *
|
1015 | * #### Complexity
|
1016 | * Linear.
|
1017 | *
|
1018 | * #### Undefined Behavior
|
1019 | * An `index` which is non-integral.
|
1020 | *
|
1021 | * #### Example
|
1022 | * ```typescript
|
1023 | * import { ArrayExt } from '@lumino/algorithm';
|
1024 | *
|
1025 | * let data = [0, 12, 23, 39, 14, 12, 75];
|
1026 | * ArrayExt.removeAt(data, 2); // 23
|
1027 | * ArrayExt.removeAt(data, -2); // 12
|
1028 | * ArrayExt.removeAt(data, 10); // undefined;
|
1029 | * ```
|
1030 | */
|
1031 | function removeAt(array, index) {
|
1032 | let n = array.length;
|
1033 | if (index < 0) {
|
1034 | index += n;
|
1035 | }
|
1036 | if (index < 0 || index >= n) {
|
1037 | return undefined;
|
1038 | }
|
1039 | let value = array[index];
|
1040 | for (let i = index + 1; i < n; ++i) {
|
1041 | array[i - 1] = array[i];
|
1042 | }
|
1043 | array.length = n - 1;
|
1044 | return value;
|
1045 | }
|
1046 | ArrayExt.removeAt = removeAt;
|
1047 | /**
|
1048 | * Remove the first occurrence of a value from an array.
|
1049 | *
|
1050 | * @param array - The array of interest.
|
1051 | *
|
1052 | * @param value - The value to remove from the array. Values are
|
1053 | * compared using strict `===` equality.
|
1054 | *
|
1055 | * @param start - The index of the first element in the range to be
|
1056 | * searched, inclusive. The default value is `0`. Negative values
|
1057 | * are taken as an offset from the end of the array.
|
1058 | *
|
1059 | * @param stop - The index of the last element in the range to be
|
1060 | * searched, inclusive. The default value is `-1`. Negative values
|
1061 | * are taken as an offset from the end of the array.
|
1062 | *
|
1063 | * @returns The index of the removed value, or `-1` if the value
|
1064 | * is not contained in the array.
|
1065 | *
|
1066 | * #### Notes
|
1067 | * If `stop < start` the search will wrap at the end of the array.
|
1068 | *
|
1069 | * #### Complexity
|
1070 | * Linear.
|
1071 | *
|
1072 | * #### Example
|
1073 | * ```typescript
|
1074 | * import { ArrayExt } from '@lumino/algorithm';
|
1075 | *
|
1076 | * let data = [0, 12, 23, 39, 14, 12, 75];
|
1077 | * ArrayExt.removeFirstOf(data, 12); // 1
|
1078 | * ArrayExt.removeFirstOf(data, 17); // -1
|
1079 | * ArrayExt.removeFirstOf(data, 39, 3); // -1
|
1080 | * ArrayExt.removeFirstOf(data, 39, 3, 2); // 2
|
1081 | * ```
|
1082 | */
|
1083 | function removeFirstOf(array, value, start = 0, stop = -1) {
|
1084 | let index = firstIndexOf(array, value, start, stop);
|
1085 | if (index !== -1) {
|
1086 | removeAt(array, index);
|
1087 | }
|
1088 | return index;
|
1089 | }
|
1090 | ArrayExt.removeFirstOf = removeFirstOf;
|
1091 | /**
|
1092 | * Remove the last occurrence of a value from an array.
|
1093 | *
|
1094 | * @param array - The array of interest.
|
1095 | *
|
1096 | * @param value - The value to remove from the array. Values are
|
1097 | * compared using strict `===` equality.
|
1098 | *
|
1099 | * @param start - The index of the first element in the range to be
|
1100 | * searched, inclusive. The default value is `-1`. Negative values
|
1101 | * are taken as an offset from the end of the array.
|
1102 | *
|
1103 | * @param stop - The index of the last element in the range to be
|
1104 | * searched, inclusive. The default value is `0`. Negative values
|
1105 | * are taken as an offset from the end of the array.
|
1106 | *
|
1107 | * @returns The index of the removed value, or `-1` if the value
|
1108 | * is not contained in the array.
|
1109 | *
|
1110 | * #### Notes
|
1111 | * If `start < stop` the search will wrap at the end of the array.
|
1112 | *
|
1113 | * #### Complexity
|
1114 | * Linear.
|
1115 | *
|
1116 | * #### Example
|
1117 | * ```typescript
|
1118 | * import { ArrayExt } from '@lumino/algorithm';
|
1119 | *
|
1120 | * let data = [0, 12, 23, 39, 14, 12, 75];
|
1121 | * ArrayExt.removeLastOf(data, 12); // 5
|
1122 | * ArrayExt.removeLastOf(data, 17); // -1
|
1123 | * ArrayExt.removeLastOf(data, 39, 2); // -1
|
1124 | * ArrayExt.removeLastOf(data, 39, 2, 3); // 3
|
1125 | * ```
|
1126 | */
|
1127 | function removeLastOf(array, value, start = -1, stop = 0) {
|
1128 | let index = lastIndexOf(array, value, start, stop);
|
1129 | if (index !== -1) {
|
1130 | removeAt(array, index);
|
1131 | }
|
1132 | return index;
|
1133 | }
|
1134 | ArrayExt.removeLastOf = removeLastOf;
|
1135 | /**
|
1136 | * Remove all occurrences of a value from an array.
|
1137 | *
|
1138 | * @param array - The array of interest.
|
1139 | *
|
1140 | * @param value - The value to remove from the array. Values are
|
1141 | * compared using strict `===` equality.
|
1142 | *
|
1143 | * @param start - The index of the first element in the range to be
|
1144 | * searched, inclusive. The default value is `0`. Negative values
|
1145 | * are taken as an offset from the end of the array.
|
1146 | *
|
1147 | * @param stop - The index of the last element in the range to be
|
1148 | * searched, inclusive. The default value is `-1`. Negative values
|
1149 | * are taken as an offset from the end of the array.
|
1150 | *
|
1151 | * @returns The number of elements removed from the array.
|
1152 | *
|
1153 | * #### Notes
|
1154 | * If `stop < start` the search will conceptually wrap at the end of
|
1155 | * the array, however the array will be traversed front-to-back.
|
1156 | *
|
1157 | * #### Complexity
|
1158 | * Linear.
|
1159 | *
|
1160 | * #### Example
|
1161 | * ```typescript
|
1162 | * import { ArrayExt } from '@lumino/algorithm';
|
1163 | *
|
1164 | * let data = [14, 12, 23, 39, 14, 12, 19, 14];
|
1165 | * ArrayExt.removeAllOf(data, 12); // 2
|
1166 | * ArrayExt.removeAllOf(data, 17); // 0
|
1167 | * ArrayExt.removeAllOf(data, 14, 1, 4); // 1
|
1168 | * ```
|
1169 | */
|
1170 | function removeAllOf(array, value, start = 0, stop = -1) {
|
1171 | let n = array.length;
|
1172 | if (n === 0) {
|
1173 | return 0;
|
1174 | }
|
1175 | if (start < 0) {
|
1176 | start = Math.max(0, start + n);
|
1177 | }
|
1178 | else {
|
1179 | start = Math.min(start, n - 1);
|
1180 | }
|
1181 | if (stop < 0) {
|
1182 | stop = Math.max(0, stop + n);
|
1183 | }
|
1184 | else {
|
1185 | stop = Math.min(stop, n - 1);
|
1186 | }
|
1187 | let count = 0;
|
1188 | for (let i = 0; i < n; ++i) {
|
1189 | if (start <= stop && i >= start && i <= stop && array[i] === value) {
|
1190 | count++;
|
1191 | }
|
1192 | else if (stop < start &&
|
1193 | (i <= stop || i >= start) &&
|
1194 | array[i] === value) {
|
1195 | count++;
|
1196 | }
|
1197 | else if (count > 0) {
|
1198 | array[i - count] = array[i];
|
1199 | }
|
1200 | }
|
1201 | if (count > 0) {
|
1202 | array.length = n - count;
|
1203 | }
|
1204 | return count;
|
1205 | }
|
1206 | ArrayExt.removeAllOf = removeAllOf;
|
1207 | /**
|
1208 | * Remove the first occurrence of a value which matches a predicate.
|
1209 | *
|
1210 | * @param array - The array of interest.
|
1211 | *
|
1212 | * @param fn - The predicate function to apply to the values.
|
1213 | *
|
1214 | * @param start - The index of the first element in the range to be
|
1215 | * searched, inclusive. The default value is `0`. Negative values
|
1216 | * are taken as an offset from the end of the array.
|
1217 | *
|
1218 | * @param stop - The index of the last element in the range to be
|
1219 | * searched, inclusive. The default value is `-1`. Negative values
|
1220 | * are taken as an offset from the end of the array.
|
1221 | *
|
1222 | * @returns The removed `{ index, value }`, which will be `-1` and
|
1223 | * `undefined` if the value is not contained in the array.
|
1224 | *
|
1225 | * #### Notes
|
1226 | * If `stop < start` the search will wrap at the end of the array.
|
1227 | *
|
1228 | * #### Complexity
|
1229 | * Linear.
|
1230 | *
|
1231 | * #### Example
|
1232 | * ```typescript
|
1233 | * import { ArrayExt } from '@lumino/algorithm';
|
1234 | *
|
1235 | * function isEven(value: number): boolean {
|
1236 | * return value % 2 === 0;
|
1237 | * }
|
1238 | *
|
1239 | * let data = [0, 12, 23, 39, 14, 12, 75];
|
1240 | * ArrayExt.removeFirstWhere(data, isEven); // { index: 0, value: 0 }
|
1241 | * ArrayExt.removeFirstWhere(data, isEven, 2); // { index: 3, value: 14 }
|
1242 | * ArrayExt.removeFirstWhere(data, isEven, 4); // { index: -1, value: undefined }
|
1243 | * ```
|
1244 | */
|
1245 | function removeFirstWhere(array, fn, start = 0, stop = -1) {
|
1246 | let value;
|
1247 | let index = findFirstIndex(array, fn, start, stop);
|
1248 | if (index !== -1) {
|
1249 | value = removeAt(array, index);
|
1250 | }
|
1251 | return { index, value };
|
1252 | }
|
1253 | ArrayExt.removeFirstWhere = removeFirstWhere;
|
1254 | /**
|
1255 | * Remove the last occurrence of a value which matches a predicate.
|
1256 | *
|
1257 | * @param array - The array of interest.
|
1258 | *
|
1259 | * @param fn - The predicate function to apply to the values.
|
1260 | *
|
1261 | * @param start - The index of the first element in the range to be
|
1262 | * searched, inclusive. The default value is `-1`. Negative values
|
1263 | * are taken as an offset from the end of the array.
|
1264 | *
|
1265 | * @param stop - The index of the last element in the range to be
|
1266 | * searched, inclusive. The default value is `0`. Negative values
|
1267 | * are taken as an offset from the end of the array.
|
1268 | *
|
1269 | * @returns The removed `{ index, value }`, which will be `-1` and
|
1270 | * `undefined` if the value is not contained in the array.
|
1271 | *
|
1272 | * #### Notes
|
1273 | * If `start < stop` the search will wrap at the end of the array.
|
1274 | *
|
1275 | * #### Complexity
|
1276 | * Linear.
|
1277 | *
|
1278 | * #### Example
|
1279 | * ```typescript
|
1280 | * import { ArrayExt } from '@lumino/algorithm';
|
1281 | *
|
1282 | * function isEven(value: number): boolean {
|
1283 | * return value % 2 === 0;
|
1284 | * }
|
1285 | *
|
1286 | * let data = [0, 12, 23, 39, 14, 12, 75];
|
1287 | * ArrayExt.removeLastWhere(data, isEven); // { index: 5, value: 12 }
|
1288 | * ArrayExt.removeLastWhere(data, isEven, 2); // { index: 1, value: 12 }
|
1289 | * ArrayExt.removeLastWhere(data, isEven, 2, 1); // { index: -1, value: undefined }
|
1290 | * ```
|
1291 | */
|
1292 | function removeLastWhere(array, fn, start = -1, stop = 0) {
|
1293 | let value;
|
1294 | let index = findLastIndex(array, fn, start, stop);
|
1295 | if (index !== -1) {
|
1296 | value = removeAt(array, index);
|
1297 | }
|
1298 | return { index, value };
|
1299 | }
|
1300 | ArrayExt.removeLastWhere = removeLastWhere;
|
1301 | /**
|
1302 | * Remove all occurrences of values which match a predicate.
|
1303 | *
|
1304 | * @param array - The array of interest.
|
1305 | *
|
1306 | * @param fn - The predicate function to apply to the values.
|
1307 | *
|
1308 | * @param start - The index of the first element in the range to be
|
1309 | * searched, inclusive. The default value is `0`. Negative values
|
1310 | * are taken as an offset from the end of the array.
|
1311 | *
|
1312 | * @param stop - The index of the last element in the range to be
|
1313 | * searched, inclusive. The default value is `-1`. Negative values
|
1314 | * are taken as an offset from the end of the array.
|
1315 | *
|
1316 | * @returns The number of elements removed from the array.
|
1317 | *
|
1318 | * #### Notes
|
1319 | * If `stop < start` the search will conceptually wrap at the end of
|
1320 | * the array, however the array will be traversed front-to-back.
|
1321 | *
|
1322 | * #### Complexity
|
1323 | * Linear.
|
1324 | *
|
1325 | * #### Example
|
1326 | * ```typescript
|
1327 | * import { ArrayExt } from '@lumino/algorithm';
|
1328 | *
|
1329 | * function isEven(value: number): boolean {
|
1330 | * return value % 2 === 0;
|
1331 | * }
|
1332 | *
|
1333 | * function isNegative(value: number): boolean {
|
1334 | * return value < 0;
|
1335 | * }
|
1336 | *
|
1337 | * let data = [0, 12, -13, -9, 23, 39, 14, -15, 12, 75];
|
1338 | * ArrayExt.removeAllWhere(data, isEven); // 4
|
1339 | * ArrayExt.removeAllWhere(data, isNegative, 0, 3); // 2
|
1340 | * ```
|
1341 | */
|
1342 | function removeAllWhere(array, fn, start = 0, stop = -1) {
|
1343 | let n = array.length;
|
1344 | if (n === 0) {
|
1345 | return 0;
|
1346 | }
|
1347 | if (start < 0) {
|
1348 | start = Math.max(0, start + n);
|
1349 | }
|
1350 | else {
|
1351 | start = Math.min(start, n - 1);
|
1352 | }
|
1353 | if (stop < 0) {
|
1354 | stop = Math.max(0, stop + n);
|
1355 | }
|
1356 | else {
|
1357 | stop = Math.min(stop, n - 1);
|
1358 | }
|
1359 | let count = 0;
|
1360 | for (let i = 0; i < n; ++i) {
|
1361 | if (start <= stop && i >= start && i <= stop && fn(array[i], i)) {
|
1362 | count++;
|
1363 | }
|
1364 | else if (stop < start && (i <= stop || i >= start) && fn(array[i], i)) {
|
1365 | count++;
|
1366 | }
|
1367 | else if (count > 0) {
|
1368 | array[i - count] = array[i];
|
1369 | }
|
1370 | }
|
1371 | if (count > 0) {
|
1372 | array.length = n - count;
|
1373 | }
|
1374 | return count;
|
1375 | }
|
1376 | ArrayExt.removeAllWhere = removeAllWhere;
|
1377 | })(ArrayExt || (ArrayExt = {}));
|
1378 |
|
1379 | // Copyright (c) Jupyter Development Team.
|
1380 | // Distributed under the terms of the Modified BSD License.
|
1381 | /*-----------------------------------------------------------------------------
|
1382 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1383 | |
|
1384 | | Distributed under the terms of the BSD 3-Clause License.
|
1385 | |
|
1386 | | The full license is in the file LICENSE, distributed with this software.
|
1387 | |----------------------------------------------------------------------------*/
|
1388 | /**
|
1389 | * Chain together several iterables.
|
1390 | *
|
1391 | * @deprecated
|
1392 | *
|
1393 | * @param objects - The iterable objects of interest.
|
1394 | *
|
1395 | * @returns An iterator which yields the values of the iterables
|
1396 | * in the order in which they are supplied.
|
1397 | *
|
1398 | * #### Example
|
1399 | * ```typescript
|
1400 | * import { chain } from '@lumino/algorithm';
|
1401 | *
|
1402 | * let data1 = [1, 2, 3];
|
1403 | * let data2 = [4, 5, 6];
|
1404 | *
|
1405 | * let stream = chain(data1, data2);
|
1406 | *
|
1407 | * Array.from(stream); // [1, 2, 3, 4, 5, 6]
|
1408 | * ```
|
1409 | */
|
1410 | function* chain(...objects) {
|
1411 | for (const object of objects) {
|
1412 | yield* object;
|
1413 | }
|
1414 | }
|
1415 |
|
1416 | // Copyright (c) Jupyter Development Team.
|
1417 | // Distributed under the terms of the Modified BSD License.
|
1418 | /*-----------------------------------------------------------------------------
|
1419 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1420 | |
|
1421 | | Distributed under the terms of the BSD 3-Clause License.
|
1422 | |
|
1423 | | The full license is in the file LICENSE, distributed with this software.
|
1424 | |----------------------------------------------------------------------------*/
|
1425 | /**
|
1426 | * Create an empty iterator.
|
1427 | *
|
1428 | * @returns A new iterator which yields nothing.
|
1429 | *
|
1430 | * #### Example
|
1431 | * ```typescript
|
1432 | * import { empty } from '@lumino/algorithm';
|
1433 | *
|
1434 | * let stream = empty<number>();
|
1435 | *
|
1436 | * Array.from(stream); // []
|
1437 | * ```
|
1438 | */
|
1439 | // eslint-disable-next-line require-yield
|
1440 | function* empty() {
|
1441 | return;
|
1442 | }
|
1443 |
|
1444 | // Copyright (c) Jupyter Development Team.
|
1445 | // Distributed under the terms of the Modified BSD License.
|
1446 | /*-----------------------------------------------------------------------------
|
1447 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1448 | |
|
1449 | | Distributed under the terms of the BSD 3-Clause License.
|
1450 | |
|
1451 | | The full license is in the file LICENSE, distributed with this software.
|
1452 | |----------------------------------------------------------------------------*/
|
1453 | /**
|
1454 | * Enumerate an iterable object.
|
1455 | *
|
1456 | * @param object - The iterable object of interest.
|
1457 | *
|
1458 | * @param start - The starting enum value. The default is `0`.
|
1459 | *
|
1460 | * @returns An iterator which yields the enumerated values.
|
1461 | *
|
1462 | * #### Example
|
1463 | * ```typescript
|
1464 | * import { enumerate } from '@lumino/algorithm';
|
1465 | *
|
1466 | * let data = ['foo', 'bar', 'baz'];
|
1467 | *
|
1468 | * let stream = enumerate(data, 1);
|
1469 | *
|
1470 | * Array.from(stream); // [[1, 'foo'], [2, 'bar'], [3, 'baz']]
|
1471 | * ```
|
1472 | */
|
1473 | function* enumerate(object, start = 0) {
|
1474 | for (const value of object) {
|
1475 | yield [start++, value];
|
1476 | }
|
1477 | }
|
1478 |
|
1479 | // Copyright (c) Jupyter Development Team.
|
1480 | // Distributed under the terms of the Modified BSD License.
|
1481 | /*-----------------------------------------------------------------------------
|
1482 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1483 | |
|
1484 | | Distributed under the terms of the BSD 3-Clause License.
|
1485 | |
|
1486 | | The full license is in the file LICENSE, distributed with this software.
|
1487 | |----------------------------------------------------------------------------*/
|
1488 | /**
|
1489 | * Filter an iterable for values which pass a test.
|
1490 | *
|
1491 | * @param object - The iterable object of interest.
|
1492 | *
|
1493 | * @param fn - The predicate function to invoke for each value.
|
1494 | *
|
1495 | * @returns An iterator which yields the values which pass the test.
|
1496 | *
|
1497 | * #### Example
|
1498 | * ```typescript
|
1499 | * import { filter } from '@lumino/algorithm';
|
1500 | *
|
1501 | * let data = [1, 2, 3, 4, 5, 6];
|
1502 | *
|
1503 | * let stream = filter(data, value => value % 2 === 0);
|
1504 | *
|
1505 | * Array.from(stream); // [2, 4, 6]
|
1506 | * ```
|
1507 | */
|
1508 | function* filter(object, fn) {
|
1509 | let index = 0;
|
1510 | for (const value of object) {
|
1511 | if (fn(value, index++)) {
|
1512 | yield value;
|
1513 | }
|
1514 | }
|
1515 | }
|
1516 |
|
1517 | // Copyright (c) Jupyter Development Team.
|
1518 | // Distributed under the terms of the Modified BSD License.
|
1519 | /*-----------------------------------------------------------------------------
|
1520 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1521 | |
|
1522 | | Distributed under the terms of the BSD 3-Clause License.
|
1523 | |
|
1524 | | The full license is in the file LICENSE, distributed with this software.
|
1525 | |----------------------------------------------------------------------------*/
|
1526 | /**
|
1527 | * Find the first value in an iterable which matches a predicate.
|
1528 | *
|
1529 | * @param object - The iterable object to search.
|
1530 | *
|
1531 | * @param fn - The predicate function to apply to the values.
|
1532 | *
|
1533 | * @returns The first matching value, or `undefined` if no matching
|
1534 | * value is found.
|
1535 | *
|
1536 | * #### Complexity
|
1537 | * Linear.
|
1538 | *
|
1539 | * #### Example
|
1540 | * ```typescript
|
1541 | * import { find } from '@lumino/algorithm';
|
1542 | *
|
1543 | * interface IAnimal { species: string, name: string };
|
1544 | *
|
1545 | * function isCat(value: IAnimal): boolean {
|
1546 | * return value.species === 'cat';
|
1547 | * }
|
1548 | *
|
1549 | * let data: IAnimal[] = [
|
1550 | * { species: 'dog', name: 'spot' },
|
1551 | * { species: 'cat', name: 'fluffy' },
|
1552 | * { species: 'alligator', name: 'pocho' }
|
1553 | * ];
|
1554 | *
|
1555 | * find(data, isCat).name; // 'fluffy'
|
1556 | * ```
|
1557 | */
|
1558 | function find(object, fn) {
|
1559 | let index = 0;
|
1560 | for (const value of object) {
|
1561 | if (fn(value, index++)) {
|
1562 | return value;
|
1563 | }
|
1564 | }
|
1565 | return undefined;
|
1566 | }
|
1567 | /**
|
1568 | * Find the index of the first value which matches a predicate.
|
1569 | *
|
1570 | * @param object - The iterable object to search.
|
1571 | *
|
1572 | * @param fn - The predicate function to apply to the values.
|
1573 | *
|
1574 | * @returns The index of the first matching value, or `-1` if no
|
1575 | * matching value is found.
|
1576 | *
|
1577 | * #### Complexity
|
1578 | * Linear.
|
1579 | *
|
1580 | * #### Example
|
1581 | * ```typescript
|
1582 | * import { findIndex } from '@lumino/algorithm';
|
1583 | *
|
1584 | * interface IAnimal { species: string, name: string };
|
1585 | *
|
1586 | * function isCat(value: IAnimal): boolean {
|
1587 | * return value.species === 'cat';
|
1588 | * }
|
1589 | *
|
1590 | * let data: IAnimal[] = [
|
1591 | * { species: 'dog', name: 'spot' },
|
1592 | * { species: 'cat', name: 'fluffy' },
|
1593 | * { species: 'alligator', name: 'pocho' }
|
1594 | * ];
|
1595 | *
|
1596 | * findIndex(data, isCat); // 1
|
1597 | * ```
|
1598 | */
|
1599 | function findIndex(object, fn) {
|
1600 | let index = 0;
|
1601 | for (const value of object) {
|
1602 | if (fn(value, index++)) {
|
1603 | return index - 1;
|
1604 | }
|
1605 | }
|
1606 | return -1;
|
1607 | }
|
1608 | /**
|
1609 | * Find the minimum value in an iterable.
|
1610 | *
|
1611 | * @param object - The iterable object to search.
|
1612 | *
|
1613 | * @param fn - The 3-way comparison function to apply to the values.
|
1614 | * It should return `< 0` if the first value is less than the second.
|
1615 | * `0` if the values are equivalent, or `> 0` if the first value is
|
1616 | * greater than the second.
|
1617 | *
|
1618 | * @returns The minimum value in the iterable. If multiple values are
|
1619 | * equivalent to the minimum, the left-most value is returned. If
|
1620 | * the iterable is empty, this returns `undefined`.
|
1621 | *
|
1622 | * #### Complexity
|
1623 | * Linear.
|
1624 | *
|
1625 | * #### Example
|
1626 | * ```typescript
|
1627 | * import { min } from '@lumino/algorithm';
|
1628 | *
|
1629 | * function numberCmp(a: number, b: number): number {
|
1630 | * return a - b;
|
1631 | * }
|
1632 | *
|
1633 | * min([7, 4, 0, 3, 9, 4], numberCmp); // 0
|
1634 | * ```
|
1635 | */
|
1636 | function min(object, fn) {
|
1637 | let result = undefined;
|
1638 | for (const value of object) {
|
1639 | if (result === undefined) {
|
1640 | result = value;
|
1641 | continue;
|
1642 | }
|
1643 | if (fn(value, result) < 0) {
|
1644 | result = value;
|
1645 | }
|
1646 | }
|
1647 | return result;
|
1648 | }
|
1649 | /**
|
1650 | * Find the maximum value in an iterable.
|
1651 | *
|
1652 | * @param object - The iterable object to search.
|
1653 | *
|
1654 | * @param fn - The 3-way comparison function to apply to the values.
|
1655 | * It should return `< 0` if the first value is less than the second.
|
1656 | * `0` if the values are equivalent, or `> 0` if the first value is
|
1657 | * greater than the second.
|
1658 | *
|
1659 | * @returns The maximum value in the iterable. If multiple values are
|
1660 | * equivalent to the maximum, the left-most value is returned. If
|
1661 | * the iterable is empty, this returns `undefined`.
|
1662 | *
|
1663 | * #### Complexity
|
1664 | * Linear.
|
1665 | *
|
1666 | * #### Example
|
1667 | * ```typescript
|
1668 | * import { max } from '@lumino/algorithm';
|
1669 | *
|
1670 | * function numberCmp(a: number, b: number): number {
|
1671 | * return a - b;
|
1672 | * }
|
1673 | *
|
1674 | * max([7, 4, 0, 3, 9, 4], numberCmp); // 9
|
1675 | * ```
|
1676 | */
|
1677 | function max(object, fn) {
|
1678 | let result = undefined;
|
1679 | for (const value of object) {
|
1680 | if (result === undefined) {
|
1681 | result = value;
|
1682 | continue;
|
1683 | }
|
1684 | if (fn(value, result) > 0) {
|
1685 | result = value;
|
1686 | }
|
1687 | }
|
1688 | return result;
|
1689 | }
|
1690 | /**
|
1691 | * Find the minimum and maximum values in an iterable.
|
1692 | *
|
1693 | * @param object - The iterable object to search.
|
1694 | *
|
1695 | * @param fn - The 3-way comparison function to apply to the values.
|
1696 | * It should return `< 0` if the first value is less than the second.
|
1697 | * `0` if the values are equivalent, or `> 0` if the first value is
|
1698 | * greater than the second.
|
1699 | *
|
1700 | * @returns A 2-tuple of the `[min, max]` values in the iterable. If
|
1701 | * multiple values are equivalent, the left-most values are returned.
|
1702 | * If the iterable is empty, this returns `undefined`.
|
1703 | *
|
1704 | * #### Complexity
|
1705 | * Linear.
|
1706 | *
|
1707 | * #### Example
|
1708 | * ```typescript
|
1709 | * import { minmax } from '@lumino/algorithm';
|
1710 | *
|
1711 | * function numberCmp(a: number, b: number): number {
|
1712 | * return a - b;
|
1713 | * }
|
1714 | *
|
1715 | * minmax([7, 4, 0, 3, 9, 4], numberCmp); // [0, 9]
|
1716 | * ```
|
1717 | */
|
1718 | function minmax(object, fn) {
|
1719 | let empty = true;
|
1720 | let vmin;
|
1721 | let vmax;
|
1722 | for (const value of object) {
|
1723 | if (empty) {
|
1724 | vmin = value;
|
1725 | vmax = value;
|
1726 | empty = false;
|
1727 | }
|
1728 | else if (fn(value, vmin) < 0) {
|
1729 | vmin = value;
|
1730 | }
|
1731 | else if (fn(value, vmax) > 0) {
|
1732 | vmax = value;
|
1733 | }
|
1734 | }
|
1735 | return empty ? undefined : [vmin, vmax];
|
1736 | }
|
1737 |
|
1738 | // Copyright (c) Jupyter Development Team.
|
1739 | // Distributed under the terms of the Modified BSD License.
|
1740 | /*-----------------------------------------------------------------------------
|
1741 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1742 | |
|
1743 | | Distributed under the terms of the BSD 3-Clause License.
|
1744 | |
|
1745 | | The full license is in the file LICENSE, distributed with this software.
|
1746 | |----------------------------------------------------------------------------*/
|
1747 | /**
|
1748 | * Create an array from an iterable of values.
|
1749 | *
|
1750 | * @deprecated
|
1751 | *
|
1752 | * @param object - The iterable object of interest.
|
1753 | *
|
1754 | * @returns A new array of values from the given object.
|
1755 | *
|
1756 | * #### Example
|
1757 | * ```typescript
|
1758 | * import { toArray } from '@lumino/algorithm';
|
1759 | *
|
1760 | * let stream = [1, 2, 3, 4, 5, 6][Symbol.iterator]();
|
1761 | *
|
1762 | * toArray(stream); // [1, 2, 3, 4, 5, 6];
|
1763 | * ```
|
1764 | */
|
1765 | function toArray(object) {
|
1766 | return Array.from(object);
|
1767 | }
|
1768 | /**
|
1769 | * Create an object from an iterable of key/value pairs.
|
1770 | *
|
1771 | * @param object - The iterable object of interest.
|
1772 | *
|
1773 | * @returns A new object mapping keys to values.
|
1774 | *
|
1775 | * #### Example
|
1776 | * ```typescript
|
1777 | * import { toObject } from '@lumino/algorithm';
|
1778 | *
|
1779 | * let data: [string, number][] = [['one', 1], ['two', 2], ['three', 3]];
|
1780 | *
|
1781 | * toObject(data); // { one: 1, two: 2, three: 3 }
|
1782 | * ```
|
1783 | */
|
1784 | function toObject(object) {
|
1785 | const result = {};
|
1786 | for (const [key, value] of object) {
|
1787 | result[key] = value;
|
1788 | }
|
1789 | return result;
|
1790 | }
|
1791 | /**
|
1792 | * Invoke a function for each value in an iterable.
|
1793 | *
|
1794 | * @deprecated
|
1795 | *
|
1796 | * @param object - The iterable object of interest.
|
1797 | *
|
1798 | * @param fn - The callback function to invoke for each value.
|
1799 | *
|
1800 | * #### Notes
|
1801 | * Iteration can be terminated early by returning `false` from the
|
1802 | * callback function.
|
1803 | *
|
1804 | * #### Complexity
|
1805 | * Linear.
|
1806 | *
|
1807 | * #### Example
|
1808 | * ```typescript
|
1809 | * import { each } from '@lumino/algorithm';
|
1810 | *
|
1811 | * let data = [5, 7, 0, -2, 9];
|
1812 | *
|
1813 | * each(data, value => { console.log(value); });
|
1814 | * ```
|
1815 | */
|
1816 | function each(object, fn) {
|
1817 | let index = 0;
|
1818 | for (const value of object) {
|
1819 | if (false === fn(value, index++)) {
|
1820 | return;
|
1821 | }
|
1822 | }
|
1823 | }
|
1824 | /**
|
1825 | * Test whether all values in an iterable satisfy a predicate.
|
1826 | *
|
1827 | * @param object - The iterable object of interest.
|
1828 | *
|
1829 | * @param fn - The predicate function to invoke for each value.
|
1830 | *
|
1831 | * @returns `true` if all values pass the test, `false` otherwise.
|
1832 | *
|
1833 | * #### Notes
|
1834 | * Iteration terminates on the first `false` predicate result.
|
1835 | *
|
1836 | * #### Complexity
|
1837 | * Linear.
|
1838 | *
|
1839 | * #### Example
|
1840 | * ```typescript
|
1841 | * import { every } from '@lumino/algorithm';
|
1842 | *
|
1843 | * let data = [5, 7, 1];
|
1844 | *
|
1845 | * every(data, value => value % 2 === 0); // false
|
1846 | * every(data, value => value % 2 === 1); // true
|
1847 | * ```
|
1848 | */
|
1849 | function every(object, fn) {
|
1850 | let index = 0;
|
1851 | for (const value of object) {
|
1852 | if (false === fn(value, index++)) {
|
1853 | return false;
|
1854 | }
|
1855 | }
|
1856 | return true;
|
1857 | }
|
1858 | /**
|
1859 | * Test whether any value in an iterable satisfies a predicate.
|
1860 | *
|
1861 | * @param object - The iterable object of interest.
|
1862 | *
|
1863 | * @param fn - The predicate function to invoke for each value.
|
1864 | *
|
1865 | * @returns `true` if any value passes the test, `false` otherwise.
|
1866 | *
|
1867 | * #### Notes
|
1868 | * Iteration terminates on the first `true` predicate result.
|
1869 | *
|
1870 | * #### Complexity
|
1871 | * Linear.
|
1872 | *
|
1873 | * #### Example
|
1874 | * ```typescript
|
1875 | * import { some } from '@lumino/algorithm';
|
1876 | *
|
1877 | * let data = [5, 7, 1];
|
1878 | *
|
1879 | * some(data, value => value === 7); // true
|
1880 | * some(data, value => value === 3); // false
|
1881 | * ```
|
1882 | */
|
1883 | function some(object, fn) {
|
1884 | let index = 0;
|
1885 | for (const value of object) {
|
1886 | if (fn(value, index++)) {
|
1887 | return true;
|
1888 | }
|
1889 | }
|
1890 | return false;
|
1891 | }
|
1892 |
|
1893 | // Copyright (c) Jupyter Development Team.
|
1894 | // Distributed under the terms of the Modified BSD License.
|
1895 | /*-----------------------------------------------------------------------------
|
1896 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1897 | |
|
1898 | | Distributed under the terms of the BSD 3-Clause License.
|
1899 | |
|
1900 | | The full license is in the file LICENSE, distributed with this software.
|
1901 | |----------------------------------------------------------------------------*/
|
1902 | /**
|
1903 | * Transform the values of an iterable with a mapping function.
|
1904 | *
|
1905 | * @param object - The iterable object of interest.
|
1906 | *
|
1907 | * @param fn - The mapping function to invoke for each value.
|
1908 | *
|
1909 | * @returns An iterator which yields the transformed values.
|
1910 | *
|
1911 | * #### Example
|
1912 | * ```typescript
|
1913 | * import { map } from '@lumino/algorithm';
|
1914 | *
|
1915 | * let data = [1, 2, 3];
|
1916 | *
|
1917 | * let stream = map(data, value => value * 2);
|
1918 | *
|
1919 | * Array.from(stream); // [2, 4, 6]
|
1920 | * ```
|
1921 | */
|
1922 | function* map(object, fn) {
|
1923 | let index = 0;
|
1924 | for (const value of object) {
|
1925 | yield fn(value, index++);
|
1926 | }
|
1927 | }
|
1928 |
|
1929 | // Copyright (c) Jupyter Development Team.
|
1930 | // Distributed under the terms of the Modified BSD License.
|
1931 | /*-----------------------------------------------------------------------------
|
1932 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
1933 | |
|
1934 | | Distributed under the terms of the BSD 3-Clause License.
|
1935 | |
|
1936 | | The full license is in the file LICENSE, distributed with this software.
|
1937 | |----------------------------------------------------------------------------*/
|
1938 | /**
|
1939 | * Create an iterator of evenly spaced values.
|
1940 | *
|
1941 | * @param start - The starting value for the range, inclusive.
|
1942 | *
|
1943 | * @param stop - The stopping value for the range, exclusive.
|
1944 | *
|
1945 | * @param step - The distance between each value.
|
1946 | *
|
1947 | * @returns An iterator which produces evenly spaced values.
|
1948 | *
|
1949 | * #### Notes
|
1950 | * In the single argument form of `range(stop)`, `start` defaults to
|
1951 | * `0` and `step` defaults to `1`.
|
1952 | *
|
1953 | * In the two argument form of `range(start, stop)`, `step` defaults
|
1954 | * to `1`.
|
1955 | *
|
1956 | * #### Example
|
1957 | * ```typescript
|
1958 | * import { range } from '@lumino/algorithm';
|
1959 | *
|
1960 | * let stream = range(2, 4);
|
1961 | *
|
1962 | * Array.from(stream); // [2, 3]
|
1963 | * ```
|
1964 | */
|
1965 | function* range(start, stop, step) {
|
1966 | if (stop === undefined) {
|
1967 | stop = start;
|
1968 | start = 0;
|
1969 | step = 1;
|
1970 | }
|
1971 | else if (step === undefined) {
|
1972 | step = 1;
|
1973 | }
|
1974 | const length = Private.rangeLength(start, stop, step);
|
1975 | for (let index = 0; index < length; index++) {
|
1976 | yield start + step * index;
|
1977 | }
|
1978 | }
|
1979 | /**
|
1980 | * The namespace for the module implementation details.
|
1981 | */
|
1982 | var Private;
|
1983 | (function (Private) {
|
1984 | /**
|
1985 | * Compute the effective length of a range.
|
1986 | *
|
1987 | * @param start - The starting value for the range, inclusive.
|
1988 | *
|
1989 | * @param stop - The stopping value for the range, exclusive.
|
1990 | *
|
1991 | * @param step - The distance between each value.
|
1992 | *
|
1993 | * @returns The number of steps need to traverse the range.
|
1994 | */
|
1995 | function rangeLength(start, stop, step) {
|
1996 | if (step === 0) {
|
1997 | return Infinity;
|
1998 | }
|
1999 | if (start > stop && step > 0) {
|
2000 | return 0;
|
2001 | }
|
2002 | if (start < stop && step < 0) {
|
2003 | return 0;
|
2004 | }
|
2005 | return Math.ceil((stop - start) / step);
|
2006 | }
|
2007 | Private.rangeLength = rangeLength;
|
2008 | })(Private || (Private = {}));
|
2009 |
|
2010 | // Copyright (c) Jupyter Development Team.
|
2011 | // Distributed under the terms of the Modified BSD License.
|
2012 | /*-----------------------------------------------------------------------------
|
2013 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2014 | |
|
2015 | | Distributed under the terms of the BSD 3-Clause License.
|
2016 | |
|
2017 | | The full license is in the file LICENSE, distributed with this software.
|
2018 | |----------------------------------------------------------------------------*/
|
2019 | function reduce(object, fn, initial) {
|
2020 | // Setup the iterator and fetch the first value.
|
2021 | const it = object[Symbol.iterator]();
|
2022 | let index = 0;
|
2023 | let first = it.next();
|
2024 | // An empty iterator and no initial value is an error.
|
2025 | if (first.done && initial === undefined) {
|
2026 | throw new TypeError('Reduce of empty iterable with no initial value.');
|
2027 | }
|
2028 | // If the iterator is empty, return the initial value.
|
2029 | if (first.done) {
|
2030 | return initial;
|
2031 | }
|
2032 | // If the iterator has a single item and no initial value, the
|
2033 | // reducer is not invoked and the first item is the return value.
|
2034 | let second = it.next();
|
2035 | if (second.done && initial === undefined) {
|
2036 | return first.value;
|
2037 | }
|
2038 | // If iterator has a single item and an initial value is provided,
|
2039 | // the reducer is invoked and that result is the return value.
|
2040 | if (second.done) {
|
2041 | return fn(initial, first.value, index++);
|
2042 | }
|
2043 | // Setup the initial accumlated value.
|
2044 | let accumulator;
|
2045 | if (initial === undefined) {
|
2046 | accumulator = fn(first.value, second.value, index++);
|
2047 | }
|
2048 | else {
|
2049 | accumulator = fn(fn(initial, first.value, index++), second.value, index++);
|
2050 | }
|
2051 | // Iterate the rest of the values, updating the accumulator.
|
2052 | let next;
|
2053 | while (!(next = it.next()).done) {
|
2054 | accumulator = fn(accumulator, next.value, index++);
|
2055 | }
|
2056 | // Return the final accumulated value.
|
2057 | return accumulator;
|
2058 | }
|
2059 |
|
2060 | // Copyright (c) Jupyter Development Team.
|
2061 | // Distributed under the terms of the Modified BSD License.
|
2062 | /*-----------------------------------------------------------------------------
|
2063 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2064 | |
|
2065 | | Distributed under the terms of the BSD 3-Clause License.
|
2066 | |
|
2067 | | The full license is in the file LICENSE, distributed with this software.
|
2068 | |----------------------------------------------------------------------------*/
|
2069 | /**
|
2070 | * Create an iterator which repeats a value a number of times.
|
2071 | *
|
2072 | * @deprecated
|
2073 | *
|
2074 | * @param value - The value to repeat.
|
2075 | *
|
2076 | * @param count - The number of times to repeat the value.
|
2077 | *
|
2078 | * @returns A new iterator which repeats the specified value.
|
2079 | *
|
2080 | * #### Example
|
2081 | * ```typescript
|
2082 | * import { repeat } from '@lumino/algorithm';
|
2083 | *
|
2084 | * let stream = repeat(7, 3);
|
2085 | *
|
2086 | * Array.from(stream); // [7, 7, 7]
|
2087 | * ```
|
2088 | */
|
2089 | function* repeat(value, count) {
|
2090 | while (0 < count--) {
|
2091 | yield value;
|
2092 | }
|
2093 | }
|
2094 | /**
|
2095 | * Create an iterator which yields a value a single time.
|
2096 | *
|
2097 | * @deprecated
|
2098 | *
|
2099 | * @param value - The value to wrap in an iterator.
|
2100 | *
|
2101 | * @returns A new iterator which yields the value a single time.
|
2102 | *
|
2103 | * #### Example
|
2104 | * ```typescript
|
2105 | * import { once } from '@lumino/algorithm';
|
2106 | *
|
2107 | * let stream = once(7);
|
2108 | *
|
2109 | * Array.from(stream); // [7]
|
2110 | * ```
|
2111 | */
|
2112 | function* once(value) {
|
2113 | yield value;
|
2114 | }
|
2115 |
|
2116 | // Copyright (c) Jupyter Development Team.
|
2117 | // Distributed under the terms of the Modified BSD License.
|
2118 | /*-----------------------------------------------------------------------------
|
2119 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2120 | |
|
2121 | | Distributed under the terms of the BSD 3-Clause License.
|
2122 | |
|
2123 | | The full license is in the file LICENSE, distributed with this software.
|
2124 | |----------------------------------------------------------------------------*/
|
2125 | /**
|
2126 | * Create an iterator for a retroable object.
|
2127 | *
|
2128 | * @param object - The retroable or array-like object of interest.
|
2129 | *
|
2130 | * @returns An iterator which traverses the object's values in reverse.
|
2131 | *
|
2132 | * #### Example
|
2133 | * ```typescript
|
2134 | * import { retro } from '@lumino/algorithm';
|
2135 | *
|
2136 | * let data = [1, 2, 3, 4, 5, 6];
|
2137 | *
|
2138 | * let stream = retro(data);
|
2139 | *
|
2140 | * Array.from(stream); // [6, 5, 4, 3, 2, 1]
|
2141 | * ```
|
2142 | */
|
2143 | function* retro(object) {
|
2144 | if (typeof object.retro === 'function') {
|
2145 | yield* object.retro();
|
2146 | }
|
2147 | else {
|
2148 | for (let index = object.length - 1; index > -1; index--) {
|
2149 | yield object[index];
|
2150 | }
|
2151 | }
|
2152 | }
|
2153 |
|
2154 | // Copyright (c) Jupyter Development Team.
|
2155 | // Distributed under the terms of the Modified BSD License.
|
2156 | /*-----------------------------------------------------------------------------
|
2157 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2158 | |
|
2159 | | Distributed under the terms of the BSD 3-Clause License.
|
2160 | |
|
2161 | | The full license is in the file LICENSE, distributed with this software.
|
2162 | |----------------------------------------------------------------------------*/
|
2163 | /**
|
2164 | * Topologically sort an iterable of edges.
|
2165 | *
|
2166 | * @param edges - The iterable object of edges to sort.
|
2167 | * An edge is represented as a 2-tuple of `[fromNode, toNode]`.
|
2168 | *
|
2169 | * @returns The topologically sorted array of nodes.
|
2170 | *
|
2171 | * #### Notes
|
2172 | * If a cycle is present in the graph, the cycle will be ignored and
|
2173 | * the return value will be only approximately sorted.
|
2174 | *
|
2175 | * #### Example
|
2176 | * ```typescript
|
2177 | * import { topologicSort } from '@lumino/algorithm';
|
2178 | *
|
2179 | * let data = [
|
2180 | * ['d', 'e'],
|
2181 | * ['c', 'd'],
|
2182 | * ['a', 'b'],
|
2183 | * ['b', 'c']
|
2184 | * ];
|
2185 | *
|
2186 | * topologicSort(data); // ['a', 'b', 'c', 'd', 'e']
|
2187 | * ```
|
2188 | */
|
2189 | function topologicSort(edges) {
|
2190 | // Setup the shared sorting state.
|
2191 | let sorted = [];
|
2192 | let visited = new Set();
|
2193 | let graph = new Map();
|
2194 | // Add the edges to the graph.
|
2195 | for (const edge of edges) {
|
2196 | addEdge(edge);
|
2197 | }
|
2198 | // Visit each node in the graph.
|
2199 | for (const [k] of graph) {
|
2200 | visit(k);
|
2201 | }
|
2202 | // Return the sorted results.
|
2203 | return sorted;
|
2204 | // Add an edge to the graph.
|
2205 | function addEdge(edge) {
|
2206 | let [fromNode, toNode] = edge;
|
2207 | let children = graph.get(toNode);
|
2208 | if (children) {
|
2209 | children.push(fromNode);
|
2210 | }
|
2211 | else {
|
2212 | graph.set(toNode, [fromNode]);
|
2213 | }
|
2214 | }
|
2215 | // Recursively visit the node.
|
2216 | function visit(node) {
|
2217 | if (visited.has(node)) {
|
2218 | return;
|
2219 | }
|
2220 | visited.add(node);
|
2221 | let children = graph.get(node);
|
2222 | if (children) {
|
2223 | for (const child of children) {
|
2224 | visit(child);
|
2225 | }
|
2226 | }
|
2227 | sorted.push(node);
|
2228 | }
|
2229 | }
|
2230 |
|
2231 | // Copyright (c) Jupyter Development Team.
|
2232 | // Distributed under the terms of the Modified BSD License.
|
2233 | /*-----------------------------------------------------------------------------
|
2234 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2235 | |
|
2236 | | Distributed under the terms of the BSD 3-Clause License.
|
2237 | |
|
2238 | | The full license is in the file LICENSE, distributed with this software.
|
2239 | |----------------------------------------------------------------------------*/
|
2240 | /**
|
2241 | * Iterate over an iterable using a stepped increment.
|
2242 | *
|
2243 | * @param object - The iterable object of interest.
|
2244 | *
|
2245 | * @param step - The distance to step on each iteration. A value
|
2246 | * of less than `1` will behave the same as a value of `1`.
|
2247 | *
|
2248 | * @returns An iterator which traverses the iterable step-wise.
|
2249 | *
|
2250 | * #### Example
|
2251 | * ```typescript
|
2252 | * import { stride } from '@lumino/algorithm';
|
2253 | *
|
2254 | * let data = [1, 2, 3, 4, 5, 6];
|
2255 | *
|
2256 | * let stream = stride(data, 2);
|
2257 | *
|
2258 | * Array.from(stream); // [1, 3, 5];
|
2259 | * ```
|
2260 | */
|
2261 | function* stride(object, step) {
|
2262 | let count = 0;
|
2263 | for (const value of object) {
|
2264 | if (0 === count++ % step) {
|
2265 | yield value;
|
2266 | }
|
2267 | }
|
2268 | }
|
2269 |
|
2270 | // Copyright (c) Jupyter Development Team.
|
2271 | // Distributed under the terms of the Modified BSD License.
|
2272 | /*-----------------------------------------------------------------------------
|
2273 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2274 | |
|
2275 | | Distributed under the terms of the BSD 3-Clause License.
|
2276 | |
|
2277 | | The full license is in the file LICENSE, distributed with this software.
|
2278 | |----------------------------------------------------------------------------*/
|
2279 | /**
|
2280 | * The namespace for string-specific algorithms.
|
2281 | */
|
2282 | var StringExt;
|
2283 | (function (StringExt) {
|
2284 | /**
|
2285 | * Find the indices of characters in a source text.
|
2286 | *
|
2287 | * @param source - The source text which should be searched.
|
2288 | *
|
2289 | * @param query - The characters to locate in the source text.
|
2290 | *
|
2291 | * @param start - The index to start the search.
|
2292 | *
|
2293 | * @returns The matched indices, or `null` if there is no match.
|
2294 | *
|
2295 | * #### Complexity
|
2296 | * Linear on `sourceText`.
|
2297 | *
|
2298 | * #### Notes
|
2299 | * In order for there to be a match, all of the characters in `query`
|
2300 | * **must** appear in `source` in the order given by `query`.
|
2301 | *
|
2302 | * Characters are matched using strict `===` equality.
|
2303 | */
|
2304 | function findIndices(source, query, start = 0) {
|
2305 | let indices = new Array(query.length);
|
2306 | for (let i = 0, j = start, n = query.length; i < n; ++i, ++j) {
|
2307 | j = source.indexOf(query[i], j);
|
2308 | if (j === -1) {
|
2309 | return null;
|
2310 | }
|
2311 | indices[i] = j;
|
2312 | }
|
2313 | return indices;
|
2314 | }
|
2315 | StringExt.findIndices = findIndices;
|
2316 | /**
|
2317 | * A string matcher which uses a sum-of-squares algorithm.
|
2318 | *
|
2319 | * @param source - The source text which should be searched.
|
2320 | *
|
2321 | * @param query - The characters to locate in the source text.
|
2322 | *
|
2323 | * @param start - The index to start the search.
|
2324 | *
|
2325 | * @returns The match result, or `null` if there is no match.
|
2326 | * A lower `score` represents a stronger match.
|
2327 | *
|
2328 | * #### Complexity
|
2329 | * Linear on `sourceText`.
|
2330 | *
|
2331 | * #### Notes
|
2332 | * This scoring algorithm uses a sum-of-squares approach to determine
|
2333 | * the score. In order for there to be a match, all of the characters
|
2334 | * in `query` **must** appear in `source` in order. The index of each
|
2335 | * matching character is squared and added to the score. This means
|
2336 | * that early and consecutive character matches are preferred, while
|
2337 | * late matches are heavily penalized.
|
2338 | */
|
2339 | function matchSumOfSquares(source, query, start = 0) {
|
2340 | let indices = findIndices(source, query, start);
|
2341 | if (!indices) {
|
2342 | return null;
|
2343 | }
|
2344 | let score = 0;
|
2345 | for (let i = 0, n = indices.length; i < n; ++i) {
|
2346 | let j = indices[i] - start;
|
2347 | score += j * j;
|
2348 | }
|
2349 | return { score, indices };
|
2350 | }
|
2351 | StringExt.matchSumOfSquares = matchSumOfSquares;
|
2352 | /**
|
2353 | * A string matcher which uses a sum-of-deltas algorithm.
|
2354 | *
|
2355 | * @param source - The source text which should be searched.
|
2356 | *
|
2357 | * @param query - The characters to locate in the source text.
|
2358 | *
|
2359 | * @param start - The index to start the search.
|
2360 | *
|
2361 | * @returns The match result, or `null` if there is no match.
|
2362 | * A lower `score` represents a stronger match.
|
2363 | *
|
2364 | * #### Complexity
|
2365 | * Linear on `sourceText`.
|
2366 | *
|
2367 | * #### Notes
|
2368 | * This scoring algorithm uses a sum-of-deltas approach to determine
|
2369 | * the score. In order for there to be a match, all of the characters
|
2370 | * in `query` **must** appear in `source` in order. The delta between
|
2371 | * the indices are summed to create the score. This means that groups
|
2372 | * of matched characters are preferred, while fragmented matches are
|
2373 | * penalized.
|
2374 | */
|
2375 | function matchSumOfDeltas(source, query, start = 0) {
|
2376 | let indices = findIndices(source, query, start);
|
2377 | if (!indices) {
|
2378 | return null;
|
2379 | }
|
2380 | let score = 0;
|
2381 | let last = start - 1;
|
2382 | for (let i = 0, n = indices.length; i < n; ++i) {
|
2383 | let j = indices[i];
|
2384 | score += j - last - 1;
|
2385 | last = j;
|
2386 | }
|
2387 | return { score, indices };
|
2388 | }
|
2389 | StringExt.matchSumOfDeltas = matchSumOfDeltas;
|
2390 | /**
|
2391 | * Highlight the matched characters of a source text.
|
2392 | *
|
2393 | * @param source - The text which should be highlighted.
|
2394 | *
|
2395 | * @param indices - The indices of the matched characters. They must
|
2396 | * appear in increasing order and must be in bounds of the source.
|
2397 | *
|
2398 | * @param fn - The function to apply to the matched chunks.
|
2399 | *
|
2400 | * @returns An array of unmatched and highlighted chunks.
|
2401 | */
|
2402 | function highlight(source, indices, fn) {
|
2403 | // Set up the result array.
|
2404 | let result = [];
|
2405 | // Set up the counter variables.
|
2406 | let k = 0;
|
2407 | let last = 0;
|
2408 | let n = indices.length;
|
2409 | // Iterator over each index.
|
2410 | while (k < n) {
|
2411 | // Set up the chunk indices.
|
2412 | let i = indices[k];
|
2413 | let j = indices[k];
|
2414 | // Advance the right chunk index until it's non-contiguous.
|
2415 | while (++k < n && indices[k] === j + 1) {
|
2416 | j++;
|
2417 | }
|
2418 | // Extract the unmatched text.
|
2419 | if (last < i) {
|
2420 | result.push(source.slice(last, i));
|
2421 | }
|
2422 | // Extract and highlight the matched text.
|
2423 | if (i < j + 1) {
|
2424 | result.push(fn(source.slice(i, j + 1)));
|
2425 | }
|
2426 | // Update the last visited index.
|
2427 | last = j + 1;
|
2428 | }
|
2429 | // Extract any remaining unmatched text.
|
2430 | if (last < source.length) {
|
2431 | result.push(source.slice(last));
|
2432 | }
|
2433 | // Return the highlighted result.
|
2434 | return result;
|
2435 | }
|
2436 | StringExt.highlight = highlight;
|
2437 | /**
|
2438 | * A 3-way string comparison function.
|
2439 | *
|
2440 | * @param a - The first string of interest.
|
2441 | *
|
2442 | * @param b - The second string of interest.
|
2443 | *
|
2444 | * @returns `-1` if `a < b`, else `1` if `a > b`, else `0`.
|
2445 | */
|
2446 | function cmp(a, b) {
|
2447 | return a < b ? -1 : a > b ? 1 : 0;
|
2448 | }
|
2449 | StringExt.cmp = cmp;
|
2450 | })(StringExt || (StringExt = {}));
|
2451 |
|
2452 | // Copyright (c) Jupyter Development Team.
|
2453 | // Distributed under the terms of the Modified BSD License.
|
2454 | /*-----------------------------------------------------------------------------
|
2455 | | Copyright (c) 2014-2017, PhosphorJS Contributors
|
2456 | |
|
2457 | | Distributed under the terms of the BSD 3-Clause License.
|
2458 | |
|
2459 | | The full license is in the file LICENSE, distributed with this software.
|
2460 | |----------------------------------------------------------------------------*/
|
2461 | /**
|
2462 | * Take a fixed number of items from an iterable.
|
2463 | *
|
2464 | * @param object - The iterable object of interest.
|
2465 | *
|
2466 | * @param count - The number of items to take from the iterable.
|
2467 | *
|
2468 | * @returns An iterator which yields the specified number of items
|
2469 | * from the source iterable.
|
2470 | *
|
2471 | * #### Notes
|
2472 | * The returned iterator will exhaust early if the source iterable
|
2473 | * contains an insufficient number of items.
|
2474 | *
|
2475 | * #### Example
|
2476 | * ```typescript
|
2477 | * import { take } from '@lumino/algorithm';
|
2478 | *
|
2479 | * let stream = take([5, 4, 3, 2, 1, 0, -1], 3);
|
2480 | *
|
2481 | * Array.from(stream); // [5, 4, 3]
|
2482 | * ```
|
2483 | */
|
2484 | function* take(object, count) {
|
2485 | if (count < 1) {
|
2486 | return;
|
2487 | }
|
2488 | const it = object[Symbol.iterator]();
|
2489 | let item;
|
2490 | while (0 < count-- && !(item = it.next()).done) {
|
2491 | yield item.value;
|
2492 | }
|
2493 | }
|
2494 |
|
2495 | // Copyright (c) Jupyter Development Team.
|
2496 | /**
|
2497 | * Iterate several iterables in lockstep.
|
2498 | *
|
2499 | * @param objects - The iterable objects of interest.
|
2500 | *
|
2501 | * @returns An iterator which yields successive tuples of values where
|
2502 | * each value is taken in turn from the provided iterables. It will
|
2503 | * be as long as the shortest provided iterable.
|
2504 | *
|
2505 | * #### Example
|
2506 | * ```typescript
|
2507 | * import { zip } from '@lumino/algorithm';
|
2508 | *
|
2509 | * let data1 = [1, 2, 3];
|
2510 | * let data2 = [4, 5, 6];
|
2511 | *
|
2512 | * let stream = zip(data1, data2);
|
2513 | *
|
2514 | * Array.from(stream); // [[1, 4], [2, 5], [3, 6]]
|
2515 | * ```
|
2516 | */
|
2517 | function* zip(...objects) {
|
2518 | const iters = objects.map(obj => obj[Symbol.iterator]());
|
2519 | let tuple = iters.map(it => it.next());
|
2520 | for (; every(tuple, item => !item.done); tuple = iters.map(it => it.next())) {
|
2521 | yield tuple.map(item => item.value);
|
2522 | }
|
2523 | }
|
2524 |
|
2525 | export { ArrayExt, StringExt, chain, each, empty, enumerate, every, filter, find, findIndex, map, max, min, minmax, once, range, reduce, repeat, retro, some, stride, take, toArray, toObject, topologicSort, zip };
|
2526 | //# sourceMappingURL=index.es6.js.map
|