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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.
Consider expanding your instructions to include example usage and maybe even a link to an external information source about
Arrray.prototype.map()This comment is hidden because it contains spoiler information about the solution
It would be better if we had to extend Array.prototype to build the map method.
nice for your first kata but a few things, this kata has been done before quite a few times :(