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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.
Why would this be more efficient?
hi, why is the convert using this symbol "&"? I thought we just need to call the function by its name and with its arity.thanks for the explanation :)
110% efficiency
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I'm not sure a Set is guaranteed to retain order, see http://www.ruby-doc.org/stdlib-1.9.3/libdoc/set/rdoc/Set.html or http://www.ruby-doc.org/stdlib-2.2.0/libdoc/set/rdoc/Set.html