It's just recursion ;-)

Oh, I'm see already. Sorry for my bad english.

I understand that my code return an array, this is because I deliberately do it to understand where and why tests break down. In the returned array, the last element is the one that I would return if the tests did not break.

If 'return m[0] === str2' output will be like this:
Expected: false, instead got: true

From portion of 'javscripts' characters can be rearranged to match 'javascript'?