From: Phlip <phlip2005@...>
Date: 2009-02-16T21:10:11+09:00
Subject: Re: What are your favorite Ruby features?

Bezan Kapadia wrote:

> Exception Handling , though it gets wacky at times...

The great thing about blocks is you can hide the wackiness:

   def foo
     x = 42
     yield_me do
       return x + 1
     end
   end

   def yield_me
     prepare()
     yield()
     explode()
   ensure
     cleanup()
   end

That is the "execute around pattern" - prepare() and cleanup() will always call 
around blocks passed to yield_me. Even if the block raises an exception.

Question - does the return throw away the explode() call? I have not yet 
bothered to determine this while coding, though I may even have used the effect 
in others' blocks, already!

-- 
   Phlip