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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.
Sets the name (alias) of result column.
What does "as mod" do?
You can read the documentation of the function in question, you know?
How does this solution (and the other similar ones) meet the "the ascii code of their first byte" requirements? I mean, where is the control for "first byte"?