From: Russell Me <russ@...>
Date: 2008-02-07T11:25:49+09:00
Subject: info on block arguments

I'm trying to pick up ruby and I'm impressed by all the cool stuff it
does out of the box. I'm reading a few books but i'm finding why's
poignant guide to ruby to be the most helpful and entertaining
(http://poignantguide.net/ruby).

However, I'm a bit stuck understanding how block arguments work. in his
example:

kitty_toys = [
   {:shape => 'sock', :fabric => 'cashmere'},
   {:shape => 'mouse', :fabric => 'calico'},
   {:shape => 'eggroll', :fabric => 'chenille'}
 ]

kitty_toys.sort_by { |toy| toy[:shape] }.each do |toy|
   puts "Blixy has a #{ toy[:shape] } made of #{ toy[:fabric] }"
 end

I know what it does. I put it through irb and it works. But i don't
understand HOW it works, exactly. Mainly, the toy bit. I don't quite get
what role it plays in the code and how the code uses it.

I've read up online and in both books I have, but, for whatever reason i
STILL cannot grasp block arguments and what role they play.

Maybe I'm just brain farting here, but if anyone could lend some tips on
this I'd appreciate it.
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