JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.8.0/lodash.min.js"></script>

<pre id="before"></pre>

<p>Using <code>_.indexBy</code></p>
<pre id="after"></pre>

JavaScript

var q = [{
      "v": "blah",
          "t": "asdfsdf",
 }, {
      "v": "basldfasdfd",
          "t": "blah",
 }];

$('#before').html(JSON.stringify(q, null, 2));


$('#after').html(JSON.stringify(_.indexBy(q, 'v'), null, 2));