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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.
not a proper issue report
What language?
EDIT: OP's favorite language seems to be Go.
Expected
: HEY JUDE
to equal
: HEY JUDE
This solution do only one allocate memory to result array
Its more efficient way to nail this kata by the memory and speed
Too many memory allocations
You can make output array at start
Cause u know amount of elements len(arr) * len(arr[0])
But very elegant