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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concatis a String methodYour code is not properly formatted so it's not easy to see, but you are creating an array (
concatis an array prototype). Please have a look at the documentation (see left panel).