Abuse underscore

ContactsCollection.js

self.reset(_.map(_.filter(contacts, function(contact) {
		return contact.emails && contact.emails.length;
	}), function(contact) {
		var name = contact.name,
			email;

		email = _.findWhere(contact.emails, {'type': 'work'}) || contact.emails[0];

		return {
			firstName: name.givenName || '',
			lastName:  name.familyName || '',
			email: email.value
		}
	}
));