1 | import { format as formatString } from '../../utils/string'
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2 | import { factory } from '../../utils/factory'
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3 |
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4 | const name = 'format'
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5 | const dependencies = ['typed']
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6 |
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7 | export const createFormat = /* #__PURE__ */ factory(name, dependencies, ({ typed }) => {
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8 | /**
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9 | * Format a value of any type into a string.
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10 | *
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11 | * Syntax:
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12 | *
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13 | * math.format(value)
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14 | * math.format(value, options)
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15 | * math.format(value, precision)
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16 | * math.format(value, callback)
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17 | *
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18 | * Where:
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19 | *
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20 | * - `value: *`
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21 | * The value to be formatted
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22 | * - `options: Object`
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23 | * An object with formatting options. Available options:
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24 | * - `notation: string`
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25 | * Number notation. Choose from:
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26 | * - 'fixed'
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27 | * Always use regular number notation.
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28 | * For example '123.40' and '14000000'
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29 | * - 'exponential'
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30 | * Always use exponential notation.
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31 | * For example '1.234e+2' and '1.4e+7'
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32 | * - 'engineering'
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33 | * Always use engineering notation: always have exponential notation,
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34 | * and select the exponent to be a multiple of 3.
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35 | * For example '123.4e+0' and '14.0e+6'
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36 | * - 'auto' (default)
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37 | * Regular number notation for numbers having an absolute value between
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38 | * `lower` and `upper` bounds, and uses exponential notation elsewhere.
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39 | * Lower bound is included, upper bound is excluded.
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40 | * For example '123.4' and '1.4e7'.
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41 | * - `precision: number`
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42 | * A number between 0 and 16 to round the digits of the number. In case
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43 | * of notations 'exponential', 'engineering', and 'auto', `precision`
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44 | * defines the total number of significant digits returned.
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45 | * In case of notation 'fixed', `precision` defines the number of
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46 | * significant digits after the decimal point.
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47 | * `precision` is undefined by default.
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48 | * - `lowerExp: number`
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49 | * Exponent determining the lower boundary for formatting a value with
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50 | * an exponent when `notation='auto`. Default value is `-3`.
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51 | * - `upperExp: number`
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52 | * Exponent determining the upper boundary for formatting a value with
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53 | * an exponent when `notation='auto`. Default value is `5`.
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54 | * - `fraction: string`. Available values: 'ratio' (default) or 'decimal'.
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55 | * For example `format(fraction(1, 3))` will output '1/3' when 'ratio' is
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56 | * configured, and will output `0.(3)` when 'decimal' is configured.
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57 | * - `callback: function`
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58 | * A custom formatting function, invoked for all numeric elements in `value`,
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59 | * for example all elements of a matrix, or the real and imaginary
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60 | * parts of a complex number. This callback can be used to override the
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61 | * built-in numeric notation with any type of formatting. Function `callback`
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62 | * is called with `value` as parameter and must return a string.
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63 | *
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64 | * When `value` is an Object:
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65 | *
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66 | * - When the object contains a property `format` being a function, this function
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67 | * is invoked as `value.format(options)` and the result is returned.
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68 | * - When the object has its own `toString` method, this method is invoked
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69 | * and the result is returned.
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70 | * - In other cases the function will loop over all object properties and
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71 | * return JSON object notation like '{"a": 2, "b": 3}'.
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72 | *
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73 | * When value is a function:
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74 | *
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75 | * - When the function has a property `syntax`, it returns this
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76 | * syntax description.
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77 | * - In other cases, a string `'function'` is returned.
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78 | *
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79 | * Examples:
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80 | *
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81 | * math.format(6.4) // returns '6.4'
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82 | * math.format(1240000) // returns '1.24e6'
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83 | * math.format(1/3) // returns '0.3333333333333333'
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84 | * math.format(1/3, 3) // returns '0.333'
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85 | * math.format(21385, 2) // returns '21000'
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86 | * math.format(12e8, {notation: 'fixed'}) // returns '1200000000'
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87 | * math.format(2.3, {notation: 'fixed', precision: 4}) // returns '2.3000'
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88 | * math.format(52.8, {notation: 'exponential'}) // returns '5.28e+1'
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89 | * math.format(12400,{notation: 'engineering'}) // returns '12.400e+3'
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90 | * math.format(2000, {lowerExp: -2, upperExp: 2}) // returns '2e+3'
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91 | *
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92 | * function formatCurrency(value) {
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93 | * // return currency notation with two digits:
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94 | * return '$' + value.toFixed(2)
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95 | *
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96 | * // you could also use math.format inside the callback:
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97 | * // return '$' + math.format(value, {notation: 'fixed', precision: 2})
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98 | * }
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99 | * math.format([2.1, 3, 0.016], formatCurrency} // returns '[$2.10, $3.00, $0.02]'
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100 | *
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101 | * See also:
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102 | *
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103 | * print
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104 | *
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105 | * @param {*} value Value to be stringified
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106 | * @param {Object | Function | number} [options] Formatting options
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107 | * @return {string} The formatted value
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108 | */
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109 | return typed(name, {
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110 | any: formatString,
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111 | 'any, Object | function | number': formatString
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112 | })
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113 | })
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