Can I tell a Ruby method to expect a specific parameter type?

Question

def doSomething(value)
    if (value.is_a?(Integer))
        print value * 2
    else
        print \"Error: Expected integer value\"
        exit
    end
end
         


        

Answer 1

You can raise an Exception anytime arbitrarily if you deem it necessary.

def doSomething(value)
    if (value.is_a?(Integer))
        print value * 2
    else
        raise "Expected integer value"
    end
end

Whether or not you really want to do this is a separate issue. :)