From: Aaron Patterson <aaron@...>
Date: 2010-02-19T08:03:04+09:00
Subject: Re: Adding self to Enumerable

On Fri, Feb 19, 2010 at 06:39:49AM +0900, Glenn Ritz wrote:
> Ryan Davis wrote:
> > On Feb 18, 2010, at 11:57 , Glenn Ritz wrote:
> > 
> >> Hi,
> >> 
> >> I would like to add self to an Enumerable object in Ruby 1.9, like in
> >> this (admittedly) contrived example:
> >> 
> >> %w(cat dog mouse).each.with_self { |e, s| puts "self: #{s.inspect}, e: #{e}" }
> > 
> > IDGI. What's the point?
> > 
> > %w(cat dog mouse).each { |e| s = self; puts "self: #{s.inspect}, e: 
> > #{e}" }
> > 
> > or better:
> > 
> > %w(cat dog mouse).each { |e| puts "self: #{self.inspect}, e: #{e}" }
> 
> 
> I want to be able to refer to the array receiver inside of the block. 
> In this code:
> 
> %w(cat dog mouse).each { |e| s = self; puts "self: #{s.inspect}, e: 
> #{e}" }
> 
> self is main (or whatever class you execute the code in), not the array.

OH! I have an *awesome* solution:

  %w(froot loops).instance_eval {
    each { |e|
      puts "self: %#{self.inspect}, e: #{e}"
    }
  }

-- 
Aaron Patterson
http://tenderlovemaking.com/