From: tho_mica_l <micathom@...>
Date: 2008-02-08T07:20:11+09:00
Subject: Re: info on block arguments


Okay, I saw I was too slow. So I only add something to the following
point:

> but what's the next bit about? namely: { |toy|
> toy[:shape] }.each do |toy|

Let's break it up. If you don't understand what's going, break the
code
in smaller pieces and step through it. Or test it in irb.

The each{} part is a totally different story.

    a.sort_by {|n| n}.each {|n| p n}

actually should be read rather like:

    a1 = a.sort_by {|n| n}
    a2 = a1.each {|n| n}

The period joins these two methods into a chain so that each()
operates
directly on the value of sort_by(), which happens to be the sorted
array.

Or to stick with the Sesame Street'ish analogy: Mrs Each doesn't care
about the Cookiemonster. That's Sorty who sees the Cookiemonster. But
Mrs. Each is a grown-up, she cannot see Cookiemonster and thinks such
things are just childish phantasies.