main
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Last change
on this file was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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File size:
572 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 SameValue = require('./SameValue');
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| 6 | var ToNumber = require('./ToNumber');
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| 7 | var ToString = require('./ToString');
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| 8 |
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| 9 | // https://262.ecma-international.org/6.0/#sec-canonicalnumericindexstring
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| 10 |
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| 11 | module.exports = function CanonicalNumericIndexString(argument) {
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| 12 | if (typeof argument !== 'string') {
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| 13 | throw new $TypeError('Assertion failed: `argument` must be a String');
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| 14 | }
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| 15 | if (argument === '-0') { return -0; }
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| 16 | var n = ToNumber(argument);
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| 17 | if (SameValue(ToString(n), argument)) { return n; }
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| 18 | return void 0;
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| 19 | };
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