From: Robert Klemme <shortcutter@...>
Date: 2009-12-21T20:53:24+09:00
Subject: Re: DESTROY in ruby

2009/12/21 Tech W. <TechWWW@yahoo.com.cn>:
>> No, objects in Ruby are simply garbage collected
>> when they go out of scope.  It is never neccesary to explicitly
>> destroy an object.  If there is any work you need done
>> before an object goes away, you had best do it before you let
>> it out of scope.
>
> for example, I openned a database handler in a class, and  new an object
> from this class, when the object go out of the scope, I want it close the
> database handler automatically. so how to implement this in Ruby? thanks
> again.

There is keyword "ensure".  You can also use blocks for this like
File.open does.  You can read up on this here:
http://blog.rubybestpractices.com/posts/rklemme/002_Writing_Block_Methods.html

Kind regards

robert

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