Consider expanding your instructions to include example usage and maybe even a link to an external information source about Arrray.prototype.map()

Then I misunderstood. I just thought there would be an array of length 1000.
Does it make any sense if an element is as large as 1000?

Thanks :)

That's one thing my friend mentioned and definitely an update i'll do! Thanks :)

Thanks Matt, I hadn't checked but thought it was an important one and wanted to create my first kata to see how it worked anyway.

Sakana378, take a look at the tests and you will see "1000".

Agreed. What's more.....

The test cases will be given an array of numbers up to 1000.

Hey guy are you kidding me? I don't see such test cases.

It would be better if we had to extend Array.prototype to build the map method.

nice for your first kata but a few things, this kata has been done before quite a few times :(