jQuery jAM, Season 6

	 
	 
function deepEqual(a,b){
	if(a === b)
		return true;
		
	if(a == null || typeof a != "object" ||
	   b == null || typeof b != "object")
	   return false;
	   
	var propsInA = 0, propsInB = 0;
	
	for (var prop in a)
		propsInA += 1;
		
	for(var prop in b){
		propsInB += 1;
		if(!(prop in a) || !deepEqual(a[prop], b{prop]))
			return false;
		}
		return propsInA == propsInB;
}

var obj = {here: {is: "an"}, object: 2};
console.log(deepEqual(obj, obj));
// → true
console.log(deepEqual(obj, {here: 1, object: 2}));
// → false
console.log(deepEqual(obj, {here: {is: "an"}, object: 2}));
// → true