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ECMAScript spec abstract operations.

There is a newer version: 1.22.3

'use strict';

var $isNaN = require('../helpers/isNaN');

// https://262.ecma-international.org/6.0/#sec-samevaluezero

module.exports = function SameValueZero(x, y) {
	return (x === y) || ($isNaN(x) && $isNaN(y));
};