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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.
lol
"Please" is the magic word.
Thanks :).
I like the zipWith tail trick, I'll have to remember that for code golf.
Include the boilerplate in a module hidden from the user, expand on the essence of the problem.
Introduce Lambda Calculus in better detail.
Another option would be to verify that
sum
works onRational
s rather thanDouble
s, unless they're already being tested.