From: Jano Svitok <jan.svitok@...>
Date: 2007-09-25T22:13:17+09:00
Subject: Re: can anybody tell me please!

On 9/25/07, Vellingiri Arul <hariharan.spc@rediffmail.com> wrote:
> I have read about Exceptions.
> While reading all the error,I have faced lot of problems.
> here I have listed out the more errors.
> I want to know the uses of all errors.
> anyone ,who knows very well in exceptions,that person could explain the
> errors for me.

You can see the Exceptions hierarchy here:
http://www.zenspider.com/Languages/Ruby/QuickRef.html#34

Here are brief explanations:

> List of errors:
>     * ArgumentError
more or less arguments were sent to a method than expected
>     * IndexError
I guess invalid index (i.e. reading from array past its end)
>     * Interrupt
Ctrl-Break pressed (SIGINT)
>     * LoadError
failure in load or require
>     * NameError
>     * NoMemoryError
Out of memory
>     * NoMethodError
invalid method called - no such method is defined
>     * NotImplementedError
placeholder - you put raise NotImplementedError into methods that you
plan to implement later, and want to see clearly (e.g. in your tests)
that the method is still not implemented
>     * RangeError
i guess invalid range specified
>     * RuntimeError
general runtime error (default for empty raise)
>     * ScriptError
general error (see hierarchy)
>     * SecurityError
see $SAFE and taint
>     * SignalException
probably something with signal handling
>     * StandardError
general base class
>     * SyntaxError
obvious
>     * SystemCallError
obvious
>     * SystemExit
i guess Kernel#exit raises this
>     * TypeError
?