From: Dave@...
Date: 2003-05-19T18:20:43+09:00
Subject: Ruby Weekly News


   Ruby Weekly News: 05/19/2003

   A summary of activity on the ruby-talk mailing list, brought to you
   this week by Holden Glova.

   ANNOUNCEMENTS
   =============

   Madeleine 0.3
          Anders Bengtsson has released a new version of Madeleine.
          Madeleine is a Ruby implementation of Object Prevalence:
          Transparent persistence of business objects using command
          logging and snapshots. Get Madeleine([1]).

   OpenSSL
          Michal Rokos has released a new version of his OpenSSL module
          for Ruby. You should be using OpenSSL >= 0.9.7 & Ruby >= 1.7.3
          Get Ruby OpenSSL([2]).

   wxRuby Beta 0.01
          Park Heesob has announced he has been working on Ruby bindings
          for wxWindows([3]). This is an early beta release. Get
          wxRuby([4]).

   INTERESTING THREADS
   ===================

   Objects vs. Data Structures
          Elegantly designing solutions for even the simpliest problem
          can challenge many object-orientated paradigms and idioms. This
          thread shows some ways you can get things done while
          continueing to evolve your object model. An interesting read.

   Enumerable#each with arguments
          Carlos, an RWN reader, submitted this summary - many thanks
          Carlos.

          Joel VanderWerf issued a suggestion: instance methods in
          Enumerable should pass on their arguments to #each. The
          rationale was, there are classes (Joel mentioned
          REXML::Elements and ObjectSpace) where #each takes arguments,
          but one can not make #collect and friends use this
          each-with-argument method because they themselves don't take
          arguments. Matz answered([5]) with an alternative approach in
          15 lines of Ruby code: extend Enumerable with a method
          #each_with, which takes the argument you want to pass to your
          object's #each and returns an object of class Enumerator. Call
          any Enumerable method on this object, and when its #each method
          is called, it will call your original object's each method
          #with the supplied argument.

References

   1. http://madeleine.sourceforge.net/
   2. http://savannah.nongnu.org/download/rubypki/
   3. http://www.wxwindows.org/
   4. http://sourceforge.jp/projects/wxruby
   5. http://www.ruby-talk.org/71301