From: Brian Candler <b.candler@...>
Date: 2009-01-19T18:21:53+09:00
Subject: Re: Higher order ruby

Gregory Brown wrote:
> But also not the same thing on Ruby 1.9, so it's important to be
> careful about this generally, even if it works fine with either in the
> above example.

Yep, it's best to avoid proc{} entirely, since in ruby 1.8 it's an alias 
for lambda{}, but in ruby 1.9 it has changed to be an alias for 
Proc.new{}.

For the full gory details see 
http://innig.net/software/ruby/closures-in-ruby.rb
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