Visitor Design Pattern

Code from the Video: http://goo.gl/XkW8s Welcome to my Visitor Design Pattern Tutorial! This is the last part of my design pattern video tutorial. The Visitor design pattern allows you to add methods to classes of different types without much altering to those classes.

• #تحصیلات_و_یادگیری
• #pattern
• #visitor_design_pattern
• #visitor