JSFiddle - React, Tailwind, and code Playground

by skilldrick

HTML

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

JavaScript

var arr = [1, 2, 3, 4];
var newArr = _.map(arr, function (item) {
    return item * 2;
});

console.log(newArr); // => [2, 4, 6, 8]