mathjs/lib/esm/type/fraction/function/fraction.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

import { factory } from '../../../utils/factory.js';
import { deepMap } from '../../../utils/collection.js';
var name = 'fraction';
var dependencies = ['typed', 'Fraction'];
export var createFraction = /* #__PURE__ */factory(name, dependencies, _ref => {
  var {
    typed,
    Fraction
  } = _ref;
  /**
   * Create a fraction or convert a value to a fraction.
   *
   * With one numeric argument, produces the closest rational approximation to the
   * input.
   * With two arguments, the first is the numerator and the second is the denominator,
   * and creates the corresponding fraction. Both numerator and denominator must be
   * integers.
   * With one object argument, looks for the integer numerator as the value of property
   * 'n' and the integer denominator as the value of property 'd'.
   * With a matrix argument, creates a matrix of the same shape with entries
   * converted into fractions.
   *
   * Syntax:
   *     math.fraction(value)
   *     math.fraction(numerator, denominator)
   *     math.fraction({n: numerator, d: denominator})
   *     math.fraction(matrix: Array | Matrix)
   *
   * Examples:
   *
   *     math.fraction(6.283)             // returns Fraction 6283/1000
   *     math.fraction(1, 3)              // returns Fraction 1/3
   *     math.fraction('2/3')             // returns Fraction 2/3
   *     math.fraction({n: 2, d: 3})      // returns Fraction 2/3
   *     math.fraction([0.2, 0.25, 1.25]) // returns Array [1/5, 1/4, 5/4]
   *     math.fraction(4, 5.1)            // throws Error: Parameters must be integer
   *
   * See also:
   *
   *    bignumber, number, string, unit
   *
   * @param {number | string | Fraction | BigNumber | bigint | Unit | Array | Matrix} [args]
   *            Arguments specifying the value, or numerator and denominator of
   *            the fraction
   * @return {Fraction | Array | Matrix} Returns a fraction
   */
  return typed('fraction', {
    number: function number(x) {
      if (!isFinite(x) || isNaN(x)) {
        throw new Error(x + ' cannot be represented as a fraction');
      }
      return new Fraction(x);
    },
    string: function string(x) {
      return new Fraction(x);
    },
    'number, number': function number_number(numerator, denominator) {
      return new Fraction(numerator, denominator);
    },
    'bigint, bigint': function bigint_bigint(numerator, denominator) {
      return new Fraction(numerator, denominator);
    },
    null: function _null(x) {
      return new Fraction(0);
    },
    BigNumber: function BigNumber(x) {
      return new Fraction(x.toString());
    },
    bigint: function bigint(x) {
      return new Fraction(x.toString());
    },
    Fraction: function Fraction(x) {
      return x; // fractions are immutable
    },
    Unit: typed.referToSelf(self => x => {
      var clone = x.clone();
      clone.value = self(x.value);
      return clone;
    }),
    Object: function Object(x) {
      return new Fraction(x);
    },
    'Array | Matrix': typed.referToSelf(self => x => deepMap(x, self))
  });
});