Variable/Method Ambiguity Gotcha

In the below mentioned program we are defining a variable called paid, while initializing the class object we are creating instance variable default value is false.

We have make_payment instance method defined here and inside that method we assigning value to the paid variable to true, just notice that in this method we are not overriding/replacing the actual instance variable so after calling the make_payment actual instance variable value won't change, if you try to print the paid value of instance will be false.

1.  
2. class Person  
3.   attr_accessor :paid  
4.     
5.   def initialize  
6.     @paid = false  
7.   end  
8.     
9.   def make_payment  
10.     puts "making payment..."  
11.     paid = true  
12.   end  
13. end  
14.   
15. person = Person.new  
16. person.make_payment  
17. puts "paid=#{person.paid}" 
18.  

Try to execute the above code and practice it by changing the variables.

Hope you will understand, i will get back to you with new concept.