← Design Patterns learning pathDesign Patterns · Module 1 of 10
Introduction to design patterns
Patterns are proven solutions to recurring design problems.
📖 Key ideas
- A design pattern is a reusable template for solving a common problem.
- The "Gang of Four" (GoF) book (1994) catalogued 23 patterns.
- Categories: creational, structural, behavioural.
- Patterns give teams a shared vocabulary.
- Use them when they fit, not everywhere.
💡 Real-life example: Design patterns are recipes: you don't invent biryani from scratch every time; you adapt a tested recipe.
Design patternReusable solution template
Gang of FourAuthors of the classic patterns book
CreationalPatterns about object creation
BehaviouralPatterns about object interaction