const _ = require('lodash');

var matchingCards = [
	{ title: 'steve', code: '2' },
	{ title: 'noah', code: '1' },
	{ title: 'noah', code: '3' },
];

var latestCardsByTitle = {};

for (var card of matchingCards) {
	var latestCard = latestCardsByTitle[card.title];
	if (!latestCard || card.code > latestCard.code) {
		latestCardsByTitle[card.title] = card;
	}
}

var latestCards = _.sortBy(latestCardsByTitle, 'title');

console.log(latestCards);