[js] parse GET parameters

parse.js

function parseQuery(query) {
	return query.split("&").reduce(function(memo, query){
		var parts = query.split('='),
			key = parts[0],
			val = encodeURIComponent(parts[1]);

		if(key.indexOf('[]') == key.length-2) {
			key = key.replace('[]', '');
			memo[key] = Array.isArray(memo[key]) ? memo[key] : [];
			memo[key].push(val);
		} else {
			memo[key] = val;
		}
		return memo;
	}, {});
}

// PHP like
$_GET = parseQuery(location.search);
// $_GET['hoge']