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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.
|is technically the bitwise OR operator, while||is the logical OR. The first one works with the binary representation of the values being compared (coerced to numbers), while the second one works directly with the values being compared.https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Bitwise_OR
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_OR