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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
can someone explain what this condition expression does/means?
n !== ~~n
still very new at this, but i think that reply is wrong. i think what's happening is that every time "val < 0", it just executes "val = 0" and resets accumulator to 0...not 100% sure how that works tbh. for test case [-1,2,3,4,-5] it returns 0. if that reply is correct then it should have returned 4.