Loading collection data...
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.
Nim translation
Oh okay, I understand thank you :)
The input given can be
null, so you should explicitly handle that first before filtering the arrayThis comment is hidden because it contains spoiler information about the solution
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