Design Patterns

• Checkout MVVM
• Checkout Atomic Design methodology
• Dependency Injunction

Used In

• SOLID principle
• Decorator

📚 Design Pattern Categories

• 🪛Creational Patterns
• 🏠Structural Pattern
• 🤝 Behavioral Patterns

📖 Definition

Design patterns are descriptions of communicating objects and classes that are customized to solve a general design problem in a particular context. They help create reusable object-oriented software that is flexible, elegant, and maintainable.

"They reuse solutions that have worked for them in the past"

Key Benefits

• 🎯 Specific to the problem at hand but general enough for future requirements
• 🔄 Reusable solutions that have been proven effective
• 🏗️ Make object-oriented designs more flexible, elegant, and reusable

🎨 Core Principles

State Pattern

Decorator Pattern

• Decorate objects so you can easily add/remove features

Model-View Separation

Decoupling views from model → separating the UI (view) from the data and business logic (model)

• The model doesn't care how it's displayed
• The view doesn't care how data is fetched or processed
• They can change independently

🔧 Popular Patterns

• Factory Design Pattern
• Builder
• Singleton
• Observer Design Pattern

Popular Other Things

• Organize them into catagories

Guard Clauses Technique

Used to write , Cleaner and more readable code

void someFunction(){
  if (wifi){
    if(login){
      if(admin){
        someFunction();
      } else {
        // Handle non-admin user
        return;
    }
  }else {
    // Handle no login
    return;
    }
  }else {
    // Handle no wifi
    return;
  }
}

This change to

void someFunction(){
  if (!wifi) {
    // Handle no wifi
    return;
  }
  if (!login) {
    // Handle no login
    return;
  }
  if (!admin) {
    // Handle non-admin user
    return;
  }
  someFunction();
}

📚 References