From: Mark Hubbart <discordantus@...>
Date: 2005-04-15T01:30:11+09:00
Subject: Re: Weaving Arrays

On 4/13/05, Martin DeMello <martindemello@yahoo.com> wrote:
> galizur@gmail.com wrote:
> >
> > Any suggestions on a quick way to weave two arrays?
> 
> This works as long as you pass it an array:
> 
> class Array
>   def weave(other)
>     zip(other * (length / other.length + 1)).flatten
>   end
> end

If the result you want is:
(1..4).weave('a'..'d') #==>[1, "a", 2, "b", 3, "c", 4, "d"]


elegant:

  module Enumerable
    def weave(*others)
      zip(*others).inject([]){|ary,items| ary + items }
    end
  end

efficient:

  module Enumerable
    def weave(*others)
      ary = []
      zip(*others){|items| ary.push *items}
      ary
    end
  end

cheers,
Mark