[ruby-talk:10705] Re: Passing on a block to a called method

On Sun, 11 Feb 2001, Michael Schuerig wrote:


> 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


Have you tried "yield" ?
Substitute each "block.call(f)" through a "yield f", that should work.


>
> 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:[e-mail]
> http://www.schuerig.de/michael/
>

--
Michael Neumann