The code in an else clause is executed if the code in the body of the begin statement runs to completion without.
Ruby raise exception with arguments.
Raised when the arguments are wrong and there isn t a more specific exception class.
Passing an argument that is not acceptable.
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First 4 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.
First 4 5 raises the exception.
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.
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.
In this article we will look at.
For each rescue clause in the begin block ruby compares the raised exception against each of the parameters in turn.
Passing the wrong number of arguments 1 2 3.