From: Robert Klemme <shortcutter@...>
Date: 2010-04-03T22:30:04+09:00
Subject: Re: combined ranges...

On 04/03/2010 01:50 PM, Colin Bartlett wrote:
> On Fri, Apr 2, 2010 at 11:33 PM, Roger Pack <rogerpack2005@gmail.com> wrote:
>> David Springer wrote:
>>> Will this work:
>>> [1..20,30..46].each{|r| r.each {|n| p n}}
>> Yeah that works.
>> I guess if I need individual values in there (like 25) I can do
>>   [1..20, 25..25, 30..46].each{|r| r.each {|n| p n}}
> 
> Given the solutions proposed, in suggesting this I have a feeling
> I may well be missing something, but since I might learn something:
> why not write a method (and maybe add it to Array) like:
> 
>   def each_element_or_range_element( arr )
>     arr.each do |er|
>       if er.kind_of?( Range ) then  er.each { |e| yield e }
>       else  yield er
>       end
>     end
>   end

Here's my general purpose solution:

module Enumerable
   def each_flat(levels, &b)
     each do |x|
       if levels > 1 && Enumerable === x
         x.each_flat(levels - 1, &b)
       else
         b[x]
       end
     end
     self
   end
end


a = [
      1,
      2,
      10..15,
      3,
      4,
      [99,100,101,["no more"]],
     ]

a.each_flat 2 do |x|
   p x
end

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/