From: "Imobach González Sosa" <imobachgs@...>
Date: 2011-01-13T01:33:03+09:00
Subject: Deferring proc bindings

Hi all,

I'm re-joining to the ruby-talk mailing list and this time I hope I
can get some spare time to read some threads :)

BTW, here's my first question. It is about procs and scopes:

  my_proc = lambda { |arg1| puts arg1; puts user }

AFAIK, arg1 is passed as a parameter (ie. when calling Proc#call) and user is
taken from the scope where my_proc is declared.

So, my question is: how could I do that 'user' was deferred until proc
is called?

  def call_my_proc(&some_proc)
    user = 'me'
    some_proc.call("Hi, it's")
  end

  my_proc = lambda { |arg1| puts arg1; puts user }
  call_my_proc(&my_proc) # "Hi, it's me"

I think I could do using eval with a string, but I'd like to solve in
block-like form.

Is that possible? Any ideas?

Thank you in advance.

-- 
Imobach González Sosa
imobachgs at gmail dot com