76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.createSign = void 0;
|
|
|
|
var _factory = require("../../utils/factory.js");
|
|
|
|
var _collection = require("../../utils/collection.js");
|
|
|
|
var _index = require("../../plain/number/index.js");
|
|
|
|
var name = 'sign';
|
|
var dependencies = ['typed', 'BigNumber', 'Fraction', 'complex'];
|
|
var createSign = /* #__PURE__ */(0, _factory.factory)(name, dependencies, function (_ref) {
|
|
var typed = _ref.typed,
|
|
_BigNumber = _ref.BigNumber,
|
|
complex = _ref.complex,
|
|
_Fraction = _ref.Fraction;
|
|
|
|
/**
|
|
* Compute the sign of a value. The sign of a value x is:
|
|
*
|
|
* - 1 when x > 0
|
|
* - -1 when x < 0
|
|
* - 0 when x == 0
|
|
*
|
|
* For matrices, the function is evaluated element wise.
|
|
*
|
|
* Syntax:
|
|
*
|
|
* math.sign(x)
|
|
*
|
|
* Examples:
|
|
*
|
|
* math.sign(3.5) // returns 1
|
|
* math.sign(-4.2) // returns -1
|
|
* math.sign(0) // returns 0
|
|
*
|
|
* math.sign([3, 5, -2, 0, 2]) // returns [1, 1, -1, 0, 1]
|
|
*
|
|
* See also:
|
|
*
|
|
* abs
|
|
*
|
|
* @param {number | BigNumber | Fraction | Complex | Array | Matrix | Unit} x
|
|
* The number for which to determine the sign
|
|
* @return {number | BigNumber | Fraction | Complex | Array | Matrix | Unit}e
|
|
* The sign of `x`
|
|
*/
|
|
return typed(name, {
|
|
number: _index.signNumber,
|
|
Complex: function Complex(x) {
|
|
return x.im === 0 ? complex((0, _index.signNumber)(x.re)) : x.sign();
|
|
},
|
|
BigNumber: function BigNumber(x) {
|
|
return new _BigNumber(x.cmp(0));
|
|
},
|
|
Fraction: function Fraction(x) {
|
|
return new _Fraction(x.s, 1);
|
|
},
|
|
'Array | Matrix': function ArrayMatrix(x) {
|
|
// deep map collection, skip zeros since sign(0) = 0
|
|
return (0, _collection.deepMap)(x, this, true);
|
|
},
|
|
Unit: function Unit(x) {
|
|
if (!x._isDerived() && x.units[0].unit.offset !== 0) {
|
|
throw new TypeError('sign is ambiguous for units with offset');
|
|
}
|
|
|
|
return this(x.value);
|
|
}
|
|
});
|
|
});
|
|
exports.createSign = createSign; |