Edit in JSFiddle

// Merge objects with properties [Lodash]

var cars = {
	data: [
		{ model: 'Ferrari' },
		{ model: 'Lamborghini' },
		{ model: 'Opel' }
	]
}

var owners = {
	data: [
		{ user: 'Adam' },
		{ user: 'Robert' },
		{ user: 'Karol' }
	]
}

lodash = _.merge(cars, owners);

console.log(lodash); // Object {data: Array[3]}