Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Create a Two Dimensional Array

Posted by Iifo Edward
Iifo Edward
16,020 Points

I don't understand why its not going through on Challenge Task 3 of 3. Anyone to help me?

Add three more arrays to the coordinates array. The coordinates array should have 4 arrays in it -- each of those arrays should have 2 items in it.

script.js 
var coordinates = [];
coordinates.push(['north', 'west']);
var coordinates = [ [2,3], [3,1], [4,6], [5,10] ];
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript Objects</title>
</head>
<body>
<script src="script.js"></script>
</body>
</html>

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

You could just solve this with a literal like you have on the last line, but then you wouldn't use the other lines (and you should never declare a variable more than once).

But since you solved step 2 by pushing an array into the empty one, you could also just push 3 more:

var coordinates = [];
coordinates.push(['north', 'west']);
coordinates.push([2,3], [3,1], [4,6]);