From: Hal Fulton <hal9000@...>
Date: 2006-04-10T16:08:21+09:00
Subject: Re: Ruby Grammar - "do"

Bihal wrote:
> Seems I must have misread that first instance of "end."
> 
> I'd still like to know why it's there!
> 

OK... look at it this way.

A block (whether {} or do/end) is attached to a method call.

A method call can (does) return a value.

That value is an object which can then have other methods
called on it.

This ugly bit of code

   mymeth(a,b) do |x|
     this
     that
   end.other_method(c,d,e)

might be better understood as

   mymeth(a,b) {|x| this; that }.other_method(c,d,e)

or even

   temp = mymeth(a,b) {|x| this; that }
   temp.other_method(c,d,e)


Does that help?


Hal