if an object is an instance of a given class with the instance_of? method from Object


myString = "asdf"

puts myString.instance_of? String # => true
puts myString.instance_of? Fixnum # => false

1.	Use instance_of? for robustness.
2.	Unlike instance_of?, is_of? or kind_of? also work if the argument is a superclass or module.
3.	Is it a string class instance
4.	Is it a number
5.	Use === to check the class type

if an object is an instance of a given class with the instance_of? method from Object : instance_of « Reflection « Ruby