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 Review Array Methods, Iterating and Two-Dimensional Arrays

Posted by luisgomez7
luisgomez7
5,557 Points

Concatening Arrays

I have no idea why my answer is wrong. Please help me.

Question: Say you have two arrays -- oldScores and newScores and you want to combine those two into a new array named allScores. Complete the code so that the new array first has the old scores listed followed by the new scores:

My answer: var allScores = allScores.concat (oldScores, newScores);

3 Answers

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

To use the "concat" method, apply it to the first of the arrays you wish to merge. Then give the second one as the argument.

In this case, that would look like: "oldScores.concat(newScores)"

luisgomez7
luisgomez7
5,557 Points
luisgomez7
luisgomez7
5,557 Points

I'm still confused. Could you please just provide the correct coding? I'm a bit tired of being stumped by a question that seems so easy.

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

I've added an example to my answer

luisgomez7
luisgomez7
5,557 Points
luisgomez7
luisgomez7
5,557 Points

Thanks