Loading collection data...
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.
good solution
Didn't know that hashes could be manipulated that way!
I personnaly prefer map/reduce because its how I learned the concept, from big data map/reduce
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
looks good, but I'm not sure I can
read where in the code, the final
comma gets chopped off. Hmmm.
Good for beginners (like me) to learn this.
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