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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.
oh yes my bad
permutations refers to the name of the function i.e., the user is using a recursive function as his solution
e.g.,
will return
This comment is hidden because it contains spoiler information about the solution
Here are 2 similar examples you can copy into your IDE and see if it makes sense: