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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.
Just FYI, in Haskell, when they say "exception", what they really mean is
error(and not exceptions likeControl.Monad.Error,Control.Exception, etc.)It might be a bit too late, but your implementation is not actually a
foldr.Really nice! I think the space-? part is a bit off though, consider a case of
'x = 1 # init', '#'(with multiple spaces between the comment and the rest of the line).