Tree Traversal (Check to see if all values are the same)

value-check.js

var tree = {
	a: 1,
	b: 1,
	c: 1,
	d: {
		d1: 1,
		d2: 1,
		d3: 1
	},
	e: 1,
	f: {
		f1: 1,
		f2: 1,
		f3: 1,
		f4: {
			f41: 1,
			f42: 1,
			f43: 1,
			f44: 1
		}
	}
};

var firstSeen, difference = false;

function compare(value) {
	if(firstSeen !== undefined) {
		if(firstSeen !== value) difference = true; 
	} else { firstSeen = value; }
}

function treeTraversal(tree, applyFunction) {
	for(var i in tree) {
		if(tree[i] !== null && typeof tree[i] === 'object') {
			treeTraversal(tree[i], compare);
		} else {
			applyFunction.apply(this, [tree[i]]);		
		}

		if(difference) return true;
	}

	return false;
}

if(treeTraversal(tree, compare)) console.log('Oops! Data is different, yo!');