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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.
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Extending prototypes, even if not for the faint of heart, on
Array
( and, yes, even onObject
! ), can be done correctly and safely. But that isn't specified or tested for here.This deserves to be marked as an
Issue
( which will need a new comment ).#Taking about JavaScript
It's an extremely bad practice to declare properties/methods on Builtin Objects such as Array.
The author of this Kata should correct this detestable part.