The same thing happen to me. I think the same solution but give me timeout in the large lists.

This solution is nice, I didn't know about WeakMap

Thanks

the only guy having fun here :) tried similar stuff, but gave up...

Maybe, maybe not. Maybe it depends on the language as well.

But it's 3kyu now, and after 8 years reranking is probably not gonna happen.

Closing.

I find most kyu 4 more easy than this kata.

Maybe just return false if no solution exist, but I agree, your points are fair ones

I agree with most of the suggested improvements here. Two things to clarify/change:

1. When no solution exists it does not make sense to return a nested array - the outcome is an empty set of solutions [], not an empty set containing an empty solution [[]]. This one needs to be changed.
2. When a single solution exists your improvement definitely is good - a set containing a single solution [[x,y,z]] makes much more sense than the un-nested solution itself [x,y,z]. However, this will invalidate all prior solutions; waiting on feedback from more experienced nerds on this one. I think a backwards compatibility shim would be appropriate.

improved version at:
https://www.codewars.com/kumite/667f498c4127b008cd4c6ddc?sel=667f498c4127b008cd4c6ddc
please approve.

clarification of the other comment: by 2 different operators, I meaned 2 different string versions of the same operator

This kata have several issues:

• sometimes uses << < < or >> > > with no added value, why adding to 2 different operators???
• oblies to return an array in the order the numbers appeared, limiting some types of solutions, and gives no explanation for it, it is not specified in the descripion, and same as before, it adds no value to the kata
• if the kata oblies to return all possible solutions, why if only 1 solutions exist, needs to be returned a an [] and not the same than any other case, an nested array, like: [ [] ]
• relies on depracated Test module

otherways great kata, super fun, should be kyu 4 at least... this can't be the same as splitting a url.

EDIT: I forked the kata, please approve, I speeded up the solution and make the changes aformention in the top section. Fork bellow:

This kata is kyu 2 for sure

Al final lo hiciste po!

You shoul tell us the concept, because many of us are lost in this kata!

very clean!

It takes less than 8ms to generate all permutations. why would you