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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.
Thanks for sharing. Didn't know you could use underscores in a number.
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Using gsub! would only apply the subtitution once, so '(({}))' would go to -> '(())'
The while loop continues until gsub returns a falsey value, at which point the string is either empty or the match could not be found.
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