From: 7stud -- <lists@...>
Date: 2012-12-29T07:51:19+09:00
Subject: Re: Ruby Koans regarding Hashes.

7stud -- wrote in post #1090511:
>
> ...ruby stores the block somewhere, and then every time you try to
> access a non-existent key, ruby executes the block.
>

I don't know if you know it or not but ruby's built in methods can have 
strange names.  For instance, when you write:

hash[key] = something

...that is syntactic sugar for this method call:

hash.[]=(key)

And the method's name is "[]=".  And when the argument to the method is 
a non-existent key, the []= method returns an array reference.

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