From: schuerig@... (Michael Schuerig)
Date: 2001-02-11T06:10:02+09:00
Subject: [ruby-talk:10684] Passing on a block to a called method


Currently, when I want to pass on the block given to one method to
called method, I do it like this:

  openAsText(file) do |f|
    f.each do |l|
      ...
    end
  end

def openAsText(file)
  block = Proc.new
  
  filter = buildTextFilter(file)
  
  if filter.empty?
    File.open(file) { |f| block.call(f) }
  else
    IO.popen("cat #{file} #{filter}") { |f| block.call(f) }
  end
end

What I'm wondering about is whether this conversion to a Proc is really
necessary or if there's a more direct way to pass on the block.

Michael

-- 
Michael Schuerig
mailto:schuerig@acm.org
http://www.schuerig.de/michael/