From: Sandor Szuecs <sandor.szuecs@...>
Date: 2010-07-13T23:26:29+09:00
Subject: Re: Errors in Ruby


On Jul 13, 2010, at 2:07 PM, Abder-rahman Ali wrote:

> In the following sentence: The raise method is from the Kernel module.
> By default, raise creates an exception of the RuntimeError class. From:
> http://rubylearning.com/satishtalim/ruby_exceptions.html
> 
> 
> What is meant by raising an exception of the "RunTimeError"? And, if we
> raise it on "ArgumentError", what is mean by that?

irb:0> ArgumentError.ancestors
=> [ArgumentError, StandardError, Exception, Object, Kernel]
irb:0> RuntimeError.ancestors
=> [RuntimeError, StandardError, Exception, Object, Kernel]
irb:0> RuntimeError.superclass
=> StandardError
irb:0> ArgumentError.superclass
=> StandardError
irb:0> begin
irb:1*     raise "foo"
irb:1>   rescue Exception => e
irb:1>   puts e.class
irb:1>   end
RuntimeError


Hth, Sandor Szücs
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