From: Dan Doel <djd15@...>
Date: 2003-12-01T18:31:46+09:00
Subject: Re: anything disappearing from Ruby for 2.0?

Michael Campbell wrote:

> That would work for the IO case, but I have used many times the ".." 
> as a flip-flop NOT relating to lines matching a regex.
>
> I think this is not the best thing for consideration of removal; I 
> haven't seen yet anyone get confused over it.


This isn't nearly as concise as ".." notation, but:

module Enumerable
    def range(from, to)
        inject(false) do |bool, val|
            bool ||= from === val
            yield val if bool
            bool &&= !(to === val)
        end
    end
end

[0,-1,34,8,9,0,1,2,3,4,5,6].range(-1,1) do |i| puts i end

Which works for anything with #each.  You could add an option for "..." 
behavior (if it's different. I can't remember).

Isn't the problem with ".." that it's matching implicitly against Perl 
style variables? If you eliminate those, then
../... has to be replaced by either a message send to an object that can 
enumerate the values, or by a loop that
handles things more explicitly.

- Dan