Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://underscorejs.org/underscore.js"></script>
<div id="sum"></div>

JavaScript

var a = [[1,2],[3,4],[5,6],[7,8]]

var col1_sum = _.reduce(a, function(memo,obj){ return memo + parseFloat(obj[0]); }, 0 );
                        
$("#sum").html(col1_sum)

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JSFiddle - React, Tailwind, and code Playground

HTML

JavaScript

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console