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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.
The keyword
thisis a fundamental construct in Javascript. Meanwhile I've had several authored katas demoted from higher kyu since I've been particularly active (when Ruby, Javascript and Coffeescript were pretty much the only supported languages on Codewars). Also don't think classes were an available feature at the time, so you might have a point there?Please don't post solutions in Discourse.