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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.
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This is surely clever, but probably shouldn't be used or marked as best practice. I'd have to performance test to be sure, but allocating an array on heap seems like it would be much slower than a branch with no array allocation. Maybe I'm wrong, in which case this would be a nice answer, but the bitwise and will always be better for both performance and readability.
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Can someone point me to where I can read up more about
how this works?
It never gets added. The way join works is it just joins the elements using the given character, doesn't append after each one.
http://www.ruby-doc.org/core-2.1.2/Array.html#method-i-join
This is so gorgeous and unique..atleast to me. I've never seen this side of ruby.
I admire this language.
looks good, but I'm not sure I can
read where in the code, the final
comma gets chopped off. Hmmm.
Simplicity has it's own beauty. But if you must engage your mind, props to you.