Class testing in Ruby-CodePudding

I have a custom class Region, which I instantiated as following : node = Region.new

I wonder what is the differences, and why the following conditions act like that :

puts node.class === Region         # => false
puts node.class == Region          # => true
puts node.is_a?(Region)            # => true
puts node.class.to_s === 'Region'  # => true

What is the best way to test (ideally, in a case condition) what is the class of my node (as it could be classes like Country or Site as well...)

Thank you for your time :)

CodePudding user response：

In a case block you can do:

case node
when Region
  # node is an instance of Region 
else
  # node is not an instance of Region
end

Which would internally check the condition in this order: Region === node. For details about the === method read this answer.