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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.
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I find it to be a nice "aha"-moment when you realize it doesn't matter because sin(0)==sin(2PI)=sin(-2PI)=...
What a dumb kata, testing "clever" mathematical "intuition", and not at all about programming.
I think the instructions are pretty unclear around how to factor in the heading to the runway.
There's also the pretty major issue that the runway heading comes in 01-36 == 10deg - 360deg whereas the wind comes in as 00-359 == 00deg - 359 deg
If we were actually taking that in to account, we should be fixing the offset issues because one ends at 360 and the other at 359, which changes the answers.
I'd like it if we could add automatic hlint support to Haskell katas!