From: Meino Christian Cramer <mccramer@...>
Date: 2003-08-12T03:14:35+09:00
Subject: Re: Ruby and OOP-design (question of an old "procedural person" ;)

Hi, :)

 THANK YOU VERY MUCH FOR THE IMMENS RESPONSE TO MY QUESTION!

 I am very happy to be on this very communicative list :o) !

 Since I am at the very very beginning of Ruby-Programming please
 understand, that I only understand the smallest part of the
 discussion...

 In the meantime I git a sorted list of "my" shortwave transmitters.

 I did:

       @list.push( [freq, stat, time, days, lang, graf, targ, 
                   loca, powr, azim,rema, stau, modu, na, ca, 
                   sa, eu, af, me, as, au, pa, cira, coco, coun, 
                   long, lati, loco, regi, stn , prst, prog] )

 for each input line.

 Then I did a 

	   @list.sort_by { |item| [item[0], item[2] ] }

 and it works smooth and fast as a ligthning.

 The above expressions sorts the broadcasters first on frequency then
 on on-air time.

 Then I thought of a list first sorted by time and then by frequency
 and wrote 

	   @list.sort_by { |item| [item[2], item[0] ] }

 and astonishly Ruby quaks ;) with :

 swlist:62:in `sort_by': comparison of Array with Array failed (ArgumentError)
        from swlist:62

 ("swlist" is the name of my ruby-script) 
 
 I dont understand that...

 I am sure that the bug is sitting in front of my monitor...but...

 What is it what I did so badly wrong ? X)

 Thank you very much for any help in advance !

 Keep being Ruby!
 Meino