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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.
convert to number
Python added
Where?
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It can return any falsy value (0, '', etc), not only false
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done
upd: just realized it was not for me, sorry
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