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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.
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Depends on the language you are using...
In Javascript you can use typeof (operand) visit for examples
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That's alright, mate.
I've added a little note. Basically, in english,
1is singular, all else is plural.You should probably grab an online dictionary and look those words up. That being said, the kata contains all rules that are necessary to solve it.