62 lines
2.0 KiB
JavaScript
62 lines
2.0 KiB
JavaScript
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);
|
|
}
|
|
});
|
|
}); |