From: Sean O'Halpin <sean.ohalpin@...>
Date: 2005-10-26T20:47:54+09:00
Subject: Re: Enumerable#build

On 10/26/05, Martin DeMello <martindemello@yahoo.com> wrote:
> class Enumerable
>  def build(seed)
>    each {|i|
>      seed.add(yield i)
>    }
>  end
> end
>
> and
>
> Array#build == Array#<<
> Hash#build(k,v) == Hash#[]
> etc
>

Not sure you tested this! :) Maybe something like this:

module Enumerable
 def build(seed)
   each {|i|
     seed.add(*(yield i))
   }
   seed
 end
end

class Hash
  alias :add :store
end
class Array
  def add(*args)
    self << args
  end
end

p [1,2,3].build({}) {|i| [i, 1]}
p [1,2,3].build([]) {|i| [i, 1]}

---------- Output ----------
{1=>1, 2=>1, 3=>1}
[[1, 1], [2, 1], [3, 1]]


Regards,

Sean