Diff Objects

diffObjects.js

var oldObj = {
	a:{value:1},
	b:{value:2},
	c:{value:3}
}

var newObj = {
	// no a
	b:{value:4}, // value change
	c:{value:3},
	d:{value:3}	// new d
}

function diffObj(oldObj,newObj){
	diffObj = {};
	
	for(var k in oldObj){
		if(newObj[k] === undefined){
			console.log('deleted');
			oldObj[k].status = 'deleted';
			diffObj[k] = oldObj[k];
		}else if(oldObj[k].value !== newObj[k].value){
			console.log('modified');
			oldObj[k].status = 'modified';
			diffObj[k] = oldObj[k];
			delete newObj[k];
		}else if(newObj[k] !== undefined && oldObj[k].value === newObj[k].value){
			delete newObj[k];
		}
	}
	for(var y in newObj){
		newObj[y].status = 'new';
		diffObj[y] = newObj[y];
	}
	return diffObj;
	
}

diffObj(oldObj,newObj);