What does :: do?

Question

I have some inherited code that I am modifying. However, I am seeing something strange(to me).

I see some code like this:

::User.find_by_email(params         


        

Answer 1

The "::" operator is used to access Classes inside modules. That way you can also indirectly access methods. Example:

module Mathematics
    class Adder
       def Adder.add(operand_one, operand_two)
           return operand_one + operand_two
       end
    end
end

You access this way:

puts “2 + 3 = “ + Mathematics::Adder.add(2, 3).to_s