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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.
it's readable if you understand regexp.
The original is pretty readable. The unreadable aspects are the variable names, and that doesn't qualify as flexing. Not everything needs to be 35 lines and it's fine.
It is worth it. But chiefly in certain self-contained and exceptional scenarios:
you can also get rid of the last semicolon :))))))))))))))))))
just learn and practice regexs. it's worth it!