JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.3/underscore-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.10/backbone-min.js"></script>
loveee

JavaScript

var MyModel = Backbone.Model.extend({});

var MyCollection = Backbone.Collection.extend({
    model: MyModel
});

var myCollection = new MyCollection([{a:'Geo',b:'Smith'},{a:'Rose',b:'Frank'},{a:'Ada',b:'Lovelace'},{a:'Amelia',b:'Badelia'}]);

var found = myCollection.filter(function(anyModel) {
    var startsWithA = new RegExp(/^[aA]/);
    return startsWithA.test(anyModel.get('a'));
});

for(i=0;i<found.length;i++) {
	$d = $('<div/>').text(found[i].get('b'));
	$d.appendTo('body');
}