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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.
I guess it won't work in all cases
eg:
equalsIgnoreCase("(123) 456-7890") => returns true
equalsIgnoreCase("(987) 654-3210") => returns false
and I don't understand why you did it. Please explain to me