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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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Does the modulo operator coerce the character to an integer?
Terrilbe, horrible, no good, very bad kata.
bad practices
It's pretty redundant to say you square the absolute value of the difference...
the indicies start at 1, but an array index starts at 0. So he is correcting for that
In what context? Not math...