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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.
My first sollution was almost the same, but there was an issue with the uppercase start of the words. The rest of the word went to lowercase list. Usage of the \b flag is pretty wise. Did not think about it.
It looks like author of the Kata should add test like:
locate( ['a', 'b', ['c', 'd', ['e']]], ']' )