JSFiddle - React, Tailwind, and code Playground

by Eric Howe

HTML

<script src="http://documentcloud.github.com/underscore/underscore-min.js"></script>
<script src="http://documentcloud.github.com/backbone/backbone-min.js"></script>

JavaScript

var a = [
    {'event_date':'2013-10-11', 'event_title':'Event 2', x: 1},
    {'event_date':'2013-01-11', 'event_title':'Event 1', x: 1},
    {'event_date':'2013-02-11', 'event_title':'Event 2', x: 2},
    {'event_date':'2013-03-11', 'event_title':'Event 2', x: 2}
];
console.log(_(a).groupBy(function(o) {
    return o.event_title + '\x00' + o.x;
}));