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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.
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I am still very confused by this, having tried many combinations of str.encode and str.decode, I am still getting UnicodeEncodeError and UnicodeDecodeError. All the tests with just ASCII characters pass for me.
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Awesome Kata, I am actually using my solution at work! :D
It would be great to have a more graphical view on Kata progress for each language, and maybe more data on what we've completed, e.g. how many Kata of which levels.
Easy to find out elsewhere, e.g. Wikipedia.
I thought that each number in an IP address could not be preceeded with 0? In which case that IP should indeed fail.