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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I don't understand it either. People are suggesting that [] is returned in place of null. but:
[] is also a truthy value, not falsy:
¬(¬A^¬B), something something my young apprentice.
This is the best solution, but the point was to do it backwards i think. :)
Nice! But it seems to have only passed 5 tests.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution