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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.
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Also, implicit global variable (no
var/let/const), implicit type conversion (n+''), string argument not in parentheses (join``) which works with template string only (not"", not'', just``), and local redefinition of variableninsidemap.It's all very code golf. :] But it works. Clever! :P