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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.
I have never seen a comment I relate to more. Literally more demotivating than the one line regex solutions.
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It also depends if a person solves it by scratch and not by using built-in or imported sorting functions or methods.
kata rank once set can't be changed, and kata rank is shared by all languages
whats easy in your language may not be as easy in other languages.