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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.
The left side of the comparison determines if the variable is NOT an "existing"
trueor an "integer""not a decimal", the result isundefinedIf the left of the comparison fails, then we move to the right comparison
If the integer is odd then return false, else return true.