From: Ken Bloom <kbloom@...>
Date: 2006-10-04T22:20:10+09:00
Subject: Re: How to DRY this?

On Wed, 04 Oct 2006 22:05:41 +0900, Peter Szinek wrote:

> Hello,
> 
> I have two very similar code snippets in two different methods, and I am 
> absolutely sure there is some nice way to DRY them in Ruby... I am still 
> a noob when comes to Ruby idioms so I'd appreciate some help ;-)
> 
>      ...
>      while element.class != Hpricot::Doc do
>          path.push element.name
>          element = element.parent
>      end
>      ...
> 
> and
>      ...
>      while element.class != Hpricot::Doc do
>          path.push element
>          element = element.parent
>      end
>      ...
> 
> 
> i.e. in the first snippet I am pushing element's names, and in the 
> latter the elements themselves.

Option 1: don't. It's a very small snippet of code.
Option 2:

def dopush
  while element.class!= Hpricot::Doc do
    path.push(yield(element))
    element = element.parent
  end
end

The first snippet becomes

dopush {|e| e.name}

The second snippet becomes

dopush {|e| e}

-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/
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