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rOACCT/node_modules/clean-css/lib/utils/natural-compare.js
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natural-compare.js
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			// adapted from http://nedbatchelder.com/blog/200712.html#e20071211T054956

			var NUMBER_PATTERN = /([0-9]+)/;

			function naturalCompare(value1, value2) {
			var keys1 = ('' + value1).split(NUMBER_PATTERN).map(tryParseInt);
			var keys2 = ('' + value2).split(NUMBER_PATTERN).map(tryParseInt);
			var key1;
			var key2;
			var compareFirst = Math.min(keys1.length, keys2.length);
			var i, l;

			for (i = 0, l = compareFirst; i < l; i++) {
			key1 = keys1[i];
			key2 = keys2[i];

			if (key1 != key2) {
			return key1 > key2 ? 1 : -1;
			}
			}

			return keys1.length > keys2.length ? 1 : (keys1.length == keys2.length ? 0 : -1);
			}

			function tryParseInt(value) {
			return ('' + parseInt(value)) == value
			? parseInt(value)
			: value;
			}

			module.exports = naturalCompare;