OP solved it, closing

loop through the array of numbers ([1,2,4,8,16]), check if n (2) is within it using your language's builtin function (if any) or another loop if not any!

Sorry, I don't know JavaScript. I think you would find help sooner if you posted at least part of your code here.

a or b might be [] (all languages except R, Shell). a or b might be nil or null or None or nothing (except in Haskell, Elixir, C++, Rust, R, Shell, PureScript).

You have to test if it's an array before trying to sort it.

i'm sorting an array especialy array1 & array2? i don't know

like that
array1.sort((a,b) => a - b);
array2.sort((a,b) => a - b);

You need to make sure what you're trying to sort is an array first.

my solution passes all the test but not one in basic test that says
TypeError: Cannot read property 'sort' of null
at comp
at /home/codewarrior/index.js:28:19
at /runner/frameworks/javascript/cw-2.js:152:11
at Promise._execute
at Promise._resolveFromExecutor
at new Promise
at Object.describe
at /home/codewarrior/index.js:13:10
at /home/codewarrior/index.js:80:5
at Object.handleError

where do you think the problem is, and what does mean that message?

so it does work that way,thanks a lot anter69 for the clarification :)

Anyone who has completed the kata.

okey thanks a lot, who has the right to translate challenges?

As soon as someone translates it ;-)

when JavaScript Translation?

what's the role of the number 10 here?