mathjs/lib/esm/function/utils/isZero.js

import { deepMap } from '../../utils/collection.js';
import { factory } from '../../utils/factory.js';
import { isZeroNumber } from '../../plain/number/index.js';
var name = 'isZero';
var dependencies = ['typed'];
export var createIsZero = /* #__PURE__ */factory(name, dependencies, (_ref) => {
  var {
    typed
  } = _ref;

  /**
   * Test whether a value is zero.
   * The function can check for zero for types `number`, `BigNumber`, `Fraction`,
   * `Complex`, and `Unit`.
   *
   * The function is evaluated element-wise in case of Array or Matrix input.
   *
   * Syntax:
   *
   *     math.isZero(x)
   *
   * Examples:
   *
   *    math.isZero(0)                     // returns true
   *    math.isZero(2)                     // returns false
   *    math.isZero(0.5)                   // returns false
   *    math.isZero(math.bignumber(0))     // returns true
   *    math.isZero(math.fraction(0))      // returns true
   *    math.isZero(math.fraction(1,3))    // returns false
   *    math.isZero(math.complex('2 - 4i') // returns false
   *    math.isZero(math.complex('0i')     // returns true
   *    math.isZero('0')                   // returns true
   *    math.isZero('2')                   // returns false
   *    math.isZero([2, 0, -3]')           // returns [false, true, false]
   *
   * See also:
   *
   *    isNumeric, isPositive, isNegative, isInteger
   *
   * @param {number | BigNumber | Complex | Fraction | Unit | Array | Matrix} x       Value to be tested
   * @return {boolean}  Returns true when `x` is zero.
   *                    Throws an error in case of an unknown data type.
   */
  return typed(name, {
    number: isZeroNumber,
    BigNumber: function BigNumber(x) {
      return x.isZero();
    },
    Complex: function Complex(x) {
      return x.re === 0 && x.im === 0;
    },
    Fraction: function Fraction(x) {
      return x.d === 1 && x.n === 0;
    },
    Unit: function Unit(x) {
      return this(x.value);
    },
    'Array | Matrix': function ArrayMatrix(x) {
      return deepMap(x, this);
    }
  });
});