From: Lionel Thiry <lthiryIdontwantspam@...>
Date: 2004-04-05T02:09:19+09:00
Subject: Re: good module use?

David A. Black a �crit :

> On Sun, 4 Apr 2004, Lionel Thiry wrote:
>>Bauduin Raphael a �crit :
>>>Hi,
>>>
>>>I thought to create a module to add an instance variable representing 
>>>the connection to a database:
>>>
>>>module MyDbModule
>>>      attr :conn
>>>      require "postgres"
>>>      pghost="localhost"
>>>      pgport=nil
>>>      pgoptions=nil
>>>      pgtty=nil
>>>      dbname="mydb"
>>>      user='mylogin'
>>>      password='mypassword'
>>>     
>>>@conn=PGconn.connect(pghost,pgport,pgoptions,pgtty,dbname,user,password)
>>>
>>>end
>>
>>To use a module variable through "MyModule.my_var", just prefix the 
>>variable name in the module with "self." or "@@".
> Not exactly; @@var is a class variable; self.var is a method call.  If
> you want an association between them, you have to write appropriate
> methods:
Oops, wrote my advice too fast! ;)
Well, I've found how I could write such a mistake... Learning from 
mistakes is always a good thing, isn't it? (but teaching them is not, 
sorry!)

Lio