From: Mike Harris <GENIE@...>
Date: 2006-11-30T06:42:05+09:00
Subject: Re: returning Procs from methods?

Giles Bowkett wrote:

> I've got something which basically does this:
>
> some_string.scan(/(whatever)/).each &do_stuff
>
> where &do_stuff is a Proc.
>
> currently there's a case/when that assigns different Procs to do_stuff
> depending on the value of some_string.
>
> what I want to do is something like this:
>
> some_string.scan(/(whatever)/).each do_stuff
>
> where do_stuff() is a method which figures out what Proc to return to
> the each().
>
> however, I can't seem to build a method which returns a Proc.
>
> can it be done?
>
The foo method returns the proc

def foo
  lambda { |x| x + 2 }
end

foo.call(4)  #6

def other_foo(&b)
  b
end

var = other_foo { |x| x + 2 }
var.call(4)   #6