Block syntax is also clearly explained in "The Ruby Programming 
Language" by Flanagan & Matsumoto in section 5.4.1.

Kyle wrote:
> Oh lawd i'm a total jackass for not realizing there was more to the 
> e-mail.
> Disregard the previous nonsense. | | is used to indicate a block 
> variable. Ya
> gotta read the pickaxe book or another ruby guide for more on what that 
> means:
> 
> http://www.ruby-doc.org/docs/ProgrammingRuby/

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