react-router-ga/example/node_modules/object-is/index.js

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"use strict";

/* https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.is */

var NumberIsNaN = function (value) {
	return value !== value;
};

module.exports = function is(a, b) {
	if (a === 0 && b === 0) {
		return 1 / a === 1 / b;
	} else if (a === b) {
		return true;
	} else if (NumberIsNaN(a) && NumberIsNaN(b)) {
		return true;
	}
	return false;
};