From: Brian Ross <p.brian.ross@...>
Date: 2008-08-29T04:27:00+09:00
Subject: Re: Writing a method to handle a code block?

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On Thu, Aug 28, 2008 at 1:36 PM, Adam Shelly <adam.shelly@gmail.com> wrote:

>
> code_block.call(vowel) is calling the method stored in the code_block
> variable, and
> passing it the argument called vowel.  When you call each_vowel like this:
>
> each_vowel {|vowel| puts vowel}
>
> The block with 'puts' is stored as code_block, and run 5 times, once
> for each letter in the array:
>  %w{a e i o u}.each { |vowel| code_block.call(vowel) }
>
> So the end result is that each vowel is printed out.
>

Intuitively I'd think that:

each_vowel {|vowel| puts vowel}

would lead to something that looked like:

 %w{a e i o u}.each { |vowel| |vowel| puts vowel.call(vowel) }

which is incomprehensible to me. I guess I am trying to really figure out
how it's working so that I can construct my own and really understand it. To
sound like an idiot: I still don't really understand how it's working.

Brian

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