JSON object sort by key - recursive

sortJSON.js

/**
 * this is a utility.
 * should NOT be used in production!
 */
function sortJSON(object) {
	if (object instanceof Array) {
		for (var i = 0; i < object.length; i++) {
			object[i] = sortJSON(object[i]);
		}
		return object;
	} else if (typeof object != "object") return object;

	var keys = Object.keys(object);
	keys = keys.sort();
	var newObject = {};
	for (var i = 0; i < keys.length; i++) {
		newObject[keys[i]] = sortJSON(object[keys[i]])
	}
	return newObject;
}