main
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Last change
on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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100644
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File size:
391 bytes
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| 1 | 'use strict';
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| 2 |
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| 3 | var $TypeError = require('es-errors/type');
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| 4 |
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| 5 | var isNaN = require('../../helpers/isNaN');
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| 6 |
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| 7 | // https://262.ecma-international.org/11.0/#sec-numeric-types-number-unaryMinus
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| 8 |
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| 9 | module.exports = function NumberUnaryMinus(x) {
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| 10 | if (typeof x !== 'number') {
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| 11 | throw new $TypeError('Assertion failed: `x` argument must be a Number');
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| 12 | }
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| 13 | if (isNaN(x)) {
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| 14 | return NaN;
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| 15 | }
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| 16 | return -x;
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| 17 | };
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