From: "Mehr, Assaph (Assaph)" <assaph@...>
Date: 2004-09-27T14:47:22+09:00
Subject: Object#send and blocks/procs

 
Hi Guys,

I started to write this email as a question, but figured the answer in
the middle... :-)
So now I want to know if there's any problem with the code below, if
there is any performance hit or if there's a simpler way to turn Procs
back into blocks.

The question is how do I #send a method to an object with an attached
proc (not block)? The simplest way to reproduce is:

  prc = lambda{ |a| a.upcase }
  puts "aaa".send(:gsub, /./)   # how do I pass prc as the block to
gsub?

Solution:

  puts "aaa".send(:gsub, /./) { |x| prc[x] }

i.e. I have wrapped my Proc object within a block. Some interspersing of
'*' may be required for multiple params, as Markus pointed out in
another thread.


Cheers,
Assaph