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.
Top voted solution, and it's wrong.
I updated the tests. It is now invalid.
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Ah cool. Thanks for noticing, learned something :)
This solution won't work because the
.map-method won't be invoked for array entries containingundefined.This comment is hidden because it contains spoiler information about the solution