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.
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They won't be reached after the return.
Please, mark your posts as having spoiler content next time when they contain code like that. About your question, because those methods return something else, read the MDN docs about array methods.
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