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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.
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ah i see thank you
For a number of 2 or more digits, the last 2 digits determine whether it is divisible by 4.
([02468][048]|[13579][26])
matches all combinations of the last 2 digits that would make the number divisible by 4.what's this for actualy ? is it default value[02468][048][13579][26]
The explanation paragraph needs some work still. It isn't that clear how to treat decimal places. The examples though do help.