From: Robert Klemme <shortcutter@...>
Date: 2012-09-24T17:29:34+09:00
Subject: Re: sandwhich principle (ruby koans)

On Mon, Sep 24, 2012 at 9:38 AM, Carlos Agarie <carlos.agarie@gmail.com> wrote:
> Roelof,
>
> This principle says that when you have two pieces of code that are almost
> identical, except for the "middle" part, you can create a method that takes
> a block to fill the "middle" part.

Another pattern which has a similar structure and uses abstract
methods and inheritance is "template method":
http://en.wikipedia.org/wiki/Template_method_pattern

Although with template method the stress is more on having different
classes filling in portions of an algorithm with different
functionality.  On a higher level of abstraction both patterns share
the property that part (or parts) of an algorithm are delegated to
another method / function which is called from the basic algorithm
implementation.

Kind regards

robert

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