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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.
如果PHP的内置函数都不够好，那凭什么要求我做得更好XD。
头回见原来三元表达式可以这么用
it's already "return", needn't "break".
What a TDD :)
what a ”multiply one more time“.(doge
awesome.while len(arr) == 1 , it will calculate normally to be 0.
resolve katas sometime like translation.your answer deserve “信，雅，达。”
you are the master!
awesome!but (d=='L') will be more readable.
this kata is not about coding, it's math.
what's your theory？
you are the best answer
awesome recursion.
YOU SCARED ME
in dart, the test say input "add" will output 2.wth?
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