comp.lang.ruby

Jano Svitok

9/25/2007 1:13:00 PM

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/QuickR...

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
?