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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.
The description is simple, write a function which returns a boolean based on three arguments. The task is kind of a puzzle more than anything.
@Chrono79 .. Many many Thanks Diego
.. Appreciate your efforts Bro 
.. hope you the best .. Regards .. Zizou 
Were you by any chance mutating the input array? I've made a fix so your function works with a copy now, try again.
@b2m9 .. Well ..