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function array_flip(trans) {
	//  discuss at: http://locutus.io/php/array_flip/
	// original by: Kevin van Zonneveld (http://kvz.io)
	// improved by: Pier Paolo Ramon (http://www.mastersoup.com/)
	// improved by: Brett Zamir (http://brett-zamir.me)
	//   example 1: array_flip( {a: 1, b: 1, c: 2} )
	//   returns 1: {1: 'b', 2: 'c'}
	let key,
		tmpArr = {}

	for (key in trans) {
		if (!trans.hasOwnProperty(key)) continue

		tmpArr[trans[key]] = key
	}

	return tmpArr
}