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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.
I cannot see it in random tests.
done
Can you add assertion messages to give the input in case of failed test?
fixed
fixed
No random tests in both languages
IIRC this seems to be an exact copy of an existing kata, by looking at the example cases
"§" is not in ASCII.
Trivial map/filter/reduce is not a novel kata idea.