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- 'use strict';
- var $TypeError = require('es-errors/type');
- var SameValue = require('./SameValue');
- var ToNumber = require('./ToNumber');
- var ToString = require('./ToString');
- // https://262.ecma-international.org/6.0/#sec-canonicalnumericindexstring
- module.exports = function CanonicalNumericIndexString(argument) {
- if (typeof argument !== 'string') {
- throw new $TypeError('Assertion failed: `argument` must be a String');
- }
- if (argument === '-0') { return -0; }
- var n = ToNumber(argument);
- if (SameValue(ToString(n), argument)) { return n; }
- return void 0;
- };
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