JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://underscorejs.org/underscore-min.js"></script>

JavaScript

var purposeObjects = [
    {purpose: "daily",value:"8157"},
    {purpose: "weekly",value:"8158"},
    {purpose: "monthly",value:"8159"}
];

var daily = _.findWhere(purposeObjects, {value:"8159"});

console.log( JSON.stringify(daily) );
console.log( purposeObjects );