In a nutshell every custom ruby exception should extend standarderror rather than the exception class the reason for this is outlined in exception handling in ruby with this in mind the simplest custom exception class that we can define will look something like this.
Ruby raise exception with arguments.
First 4 5 raises the exception.
In ruby like in most languages an exception is a way to convey that something went wrong.
Wrong number of arguments given 2 expected 1 ex.
Raised when the arguments are wrong and there isn t a more specific exception class.
First 4 raises the exception.
The code in an else clause is executed if the code in the body of the begin statement runs to completion without.
Passing an argument that is not acceptable.
While some languages only use exceptions for truly exceptional circumstances like run time errors ruby uses exceptions for a wide variety of errors and unexpected results.
The match will succeed if the exception named in the rescue clause is the same as the type of the currently thrown exception or is a superclass of that exception.
The match will succeed if the exception named in the rescue clause is the same as the type of the currently thrown exception or is a superclass of that exception.
For each rescue clause in the begin block ruby compares the raised exception against each of the parameters in turn.
In this article we will look at.