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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.
Because this implementation needs FIFO behavior. Though, kotlin lists have first() and last() methods that may provide same behavior original Java lists didn't. Moreover, some would say that push() and pop() is semantisemantically clearer.
But that's being super-pedantic since you're returning a list and not an array. It's a shared description. Imo returning a tuple in this context makes more sense for Python.
Why simple list will not do the job? Don't understand what's the purpose of using
StackorArrayDequehere...