From: Tom Copeland <tom@...>
Date: 2006-11-28T11:08:58+09:00
Subject: Re: Help me design my exception classes

On Tue, 2006-11-28 at 10:07 +0900, J. B. Rainsberger wrote:
> Being a Java programmer learning Ruby,

Welcome!  Your JUnit book rocks.
 
> What's the corresponding exception class in Ruby to Java's generic 
> RuntimeException. Is it RuntimeError? StandardError? Exception? Does 
> anyone want to tell me I'm nuts and show me a more "standard" way of 
> designing exceptions in Ruby?

I usually rescue a generic Exception:

===========
$ irb
irb(main):001:0> begin
irb(main):002:1* raise "hey"
irb(main):003:1> rescue Exception => e
irb(main):004:1> puts e.class
irb(main):005:1> end
RuntimeError
=> nil
===========

You can create your own exceptions, of course:

===========
irb(main):006:0> class MyException < Exception
irb(main):007:1> def initialize ; puts "hello" ; super ; end
irb(main):008:1> end
=> nil
irb(main):009:0> MyException.new
hello
=> #<MyException: MyException>
===========

Yours,

Tom