1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.createPow = void 0;
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7 |
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8 | var _factory = require("../../utils/factory");
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9 |
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10 | var _number = require("../../utils/number");
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11 |
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12 | var _array = require("../../utils/array");
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13 |
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14 | var _number2 = require("../../plain/number");
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15 |
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16 | var name = 'pow';
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17 | var dependencies = ['typed', 'config', 'identity', 'multiply', 'matrix', 'fraction', 'number', 'Complex'];
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18 | var createPow = (0, _factory.factory)(name, dependencies, function (_ref) {
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19 | var typed = _ref.typed,
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20 | config = _ref.config,
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21 | identity = _ref.identity,
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22 | multiply = _ref.multiply,
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23 | matrix = _ref.matrix,
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24 | number = _ref.number,
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25 | fraction = _ref.fraction,
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26 | Complex = _ref.Complex;
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27 |
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28 | |
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56 |
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57 |
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58 |
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59 |
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60 | return typed(name, {
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61 | 'number, number': _pow,
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62 | 'Complex, Complex': function ComplexComplex(x, y) {
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63 | return x.pow(y);
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64 | },
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65 | 'BigNumber, BigNumber': function BigNumberBigNumber(x, y) {
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66 | if (y.isInteger() || x >= 0 || config.predictable) {
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67 | return x.pow(y);
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68 | } else {
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69 | return new Complex(x.toNumber(), 0).pow(y.toNumber(), 0);
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70 | }
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71 | },
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72 | 'Fraction, Fraction': function FractionFraction(x, y) {
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73 | if (y.d !== 1) {
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74 | if (config.predictable) {
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75 | throw new Error('Function pow does not support non-integer exponents for fractions.');
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76 | } else {
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77 | return _pow(x.valueOf(), y.valueOf());
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78 | }
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79 | } else {
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80 | return x.pow(y);
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81 | }
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82 | },
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83 | 'Array, number': _powArray,
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84 | 'Array, BigNumber': function ArrayBigNumber(x, y) {
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85 | return _powArray(x, y.toNumber());
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86 | },
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87 | 'Matrix, number': _powMatrix,
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88 | 'Matrix, BigNumber': function MatrixBigNumber(x, y) {
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89 | return _powMatrix(x, y.toNumber());
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90 | },
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91 | 'Unit, number | BigNumber': function UnitNumberBigNumber(x, y) {
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92 | return x.pow(y);
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93 | }
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94 | });
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95 | |
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97 |
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99 |
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100 |
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101 |
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102 |
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103 | function _pow(x, y) {
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104 |
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105 |
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106 | if (config.predictable && !(0, _number.isInteger)(y) && x < 0) {
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107 |
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108 | try {
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109 | var yFrac = fraction(y);
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110 | var yNum = number(yFrac);
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111 |
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112 | if (y === yNum || Math.abs((y - yNum) / y) < 1e-14) {
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113 | if (yFrac.d % 2 === 1) {
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114 | return (yFrac.n % 2 === 0 ? 1 : -1) * Math.pow(-x, y);
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115 | }
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116 | }
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117 | } catch (ex) {}
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118 |
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119 |
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120 | }
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121 |
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122 |
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123 |
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124 |
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125 | if (config.predictable && (x < -1 && y === Infinity || x > -1 && x < 0 && y === -Infinity)) {
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126 | return NaN;
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127 | }
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128 |
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129 | if ((0, _number.isInteger)(y) || x >= 0 || config.predictable) {
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130 | return (0, _number2.powNumber)(x, y);
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131 | } else {
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132 |
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133 |
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134 |
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135 | if (x * x < 1 && y === Infinity || x * x > 1 && y === -Infinity) {
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136 | return 0;
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137 | }
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138 |
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139 | return new Complex(x, 0).pow(y, 0);
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140 | }
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141 | }
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142 | |
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149 |
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150 |
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151 | function _powArray(x, y) {
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152 | if (!(0, _number.isInteger)(y) || y < 0) {
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153 | throw new TypeError('For A^b, b must be a positive integer (value is ' + y + ')');
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154 | }
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155 |
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156 |
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157 | var s = (0, _array.arraySize)(x);
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158 |
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159 | if (s.length !== 2) {
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160 | throw new Error('For A^b, A must be 2 dimensional (A has ' + s.length + ' dimensions)');
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161 | }
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162 |
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163 | if (s[0] !== s[1]) {
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164 | throw new Error('For A^b, A must be square (size is ' + s[0] + 'x' + s[1] + ')');
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165 | }
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166 |
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167 | var res = identity(s[0]).valueOf();
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168 | var px = x;
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169 |
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170 | while (y >= 1) {
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171 | if ((y & 1) === 1) {
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172 | res = multiply(px, res);
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173 | }
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174 |
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175 | y >>= 1;
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176 | px = multiply(px, px);
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177 | }
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178 |
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179 | return res;
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180 | }
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181 | |
182 |
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183 |
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184 |
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185 |
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186 |
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187 |
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188 |
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189 |
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190 | function _powMatrix(x, y) {
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191 | return matrix(_powArray(x.valueOf(), y));
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192 | }
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193 | });
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194 | exports.createPow = createPow; |
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