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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.
You are absolutely right! However, in codewars I view 1-line solutions more like a mini-achievement of making a code in one line, rather than the practical solution and I think there can't be good argument against writing your code in a more coherent way, naming almost every variable in an understandable way so others didn't have the hard time reading your code
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My god this is good