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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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TTcandy, thanks for compliment. I think I have basic knowledge of JS, nothing fancy. But I saw you solved even 1kyu task. I think I never did even 2kyu one. I just always try to think the tasks over more deeply first, to really understand them, with common sense or with simple mathematics, logics. Then I choose one solution from mixing and matching my basic JS knowledge. Usually I find a solution that works, even if it is basic. I also like to see what I do, to read my own code as if I was reading an English sentence. I don't solve kyu 1 or 2 because those tasks are so complicated (let alone solving them) that for me they seem too far from common sense. By the way, those few months learning that I mentioned is all my programming learning, I started with JS and learned only that for that few months, I don't even know any other programming language.
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HAhhhh,you are so funny.you just learned a few months then you could do it, it was amazing.But like me, i have learnt js for 3 years, i am still poor ability.
It is possible... It seems that you are right...Telling the truth, I have done this about a year ago. I have learned JS for a few months and have done my kyu level in about a months time, then I have stopped learning and started forgetting. Now this code seems to me like chinese. It is definitely my solution, but it feels like as if it wasn't. I don't really see through now what was going on here. Now I don't even understand the Kata. I will learn again and check it again sometimes.