Factory Design Pattern or Factory Method Design Pattern: Learn Factory Method Design Pattern from Real World Example by creating a Milk Shake Factory

Factory Pattern or Simple Factory Design Pattern: Learn Simple Factory Design Pattern from Real World Example by creating a Milk Shake Factory

Decorator Pattern or Decorator Design Pattern: Learn Design Pattern Decorator with a Real World Example by creating a Coffee Ordering System

Observer Pattern or Observer Design Pattern: Learn Observer Design Pattern in detail from a Real World Example by creating a Magazine's Subscription System

Strategy Pattern or Strategy Design Pattern: Learn Strategy Design Pattern by understanding a Real World example of hierarchies that involves interfaces, inheritance and ducks!