Level Up Your Coding Skills with These 4 Essential Design Patterns

These four patterns help you write cleaner, more efficient code, making your software development journey a lot smoother.

1. Singleton

• What It Does: Ensures that only one instance of a class exists.
• How It Works: The class’s constructor and the object itself are kept private. Access to the object is provided through a static getInstance method.
• Why You Need It: When you want to control access to a single instance of a class throughout your program.

2. Proxy

• What It Does: Allows alternative access to a resource.
• How It Works: It encapsulates complex processes and provides simplified functionality. It’s useful for tasks like access control via password checks and on-demand resource loading.
• Why You Need It: When you need to add an extra layer of control or hide complexity in accessing a resource.

3. Flyweight

• What It Does: Minimizes memory usage when you need a large number of objects sharing some common properties.
• How It Works: Objects with shared properties are stored once and reused when needed.
• Why You Need It: When you have many similar objects and want to save memory by sharing common data among them, similar to how a database stores data in the third normal form.