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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.
SatXa, yes you are right. It's some very old solution when regex was new for me. It looks really crappy for me now :P
yes, all comments are accessible from the dashboard of anyone. They won't see the solution itself, but any comment that does not have a spoiler flag will be readable.
spoiler flag, damn you! x/