js: recursive object enumerator

enumObj.js

function enumObj(obj) {
	function recur(obj, acc) {
		for(var prop in obj) {
			if(obj[prop] instanceof Object && typeof obj[prop] === 'object') {
				acc.push(recur(obj[prop], []));
			} else {
				acc.push(prop + ':' + obj[prop]);
			}
		}
		return acc;
	}
	return recur(obj, []);
}