Command Pattern in Go: Encapsulating Requests as Objects

Command Pattern turns requests into objects. Instead of directly calling a method, you create a command object that encapsulates all information about the action: what to do, with what parameters, on which object.

It’s like an order in a restaurant: the waiter doesn’t cook the food themselves, they write the order on paper and pass it to the kitchen. The paper is the command. It can be delayed, canceled, repeated, or passed to another cook.

Strategy Pattern in Go: Choosing Algorithm at Runtime

Strategy Pattern is a way to choose an algorithm at runtime. Instead of hardcoded logic, you get flexibility: the same code works with different algorithms that can be changed on the fly.

Imagine a navigator: you can choose a route - fast, short, or scenic. The navigator doesn’t change, only the route-building strategy changes.

Proxy Pattern in Go: Access Control and Resource Management

Proxy pattern provides a surrogate or placeholder for another object to control access to it. It acts as an intermediary, adding functionality without changing the original object.

Here’s when and how to use it in real-world Go applications.

Builder Pattern in Go: Step-by-Step Construction of Complex Objects

Builder pattern separates object construction from its representation. It allows creating different representations of an object using the same construction process.

Here’s how to implement it properly in Go with real-world examples.

Observer Pattern in Go: Event Subscription Implementation

Observer pattern is one of the most useful behavioral patterns. It establishes one-to-many dependency between objects: when one object changes state, all dependents are notified automatically.

Here’s how to implement it properly in Go with real-world examples.

Facade Pattern in Go: Simplifying Subsystem Interactions

Facade Pattern is a simplified interface to a complex system. Instead of dealing with dozens of classes and methods, the client works with one simple facade that hides all the complexity inside.

It’s like a concierge at a hotel: you don’t call the laundry, restaurant, and housekeeping separately. You tell the concierge what you need, and they coordinate everything for you.

Singleton Pattern in Go: Implementation and Use Cases

Singleton is one of the most controversial patterns. Some call it an anti-pattern, others use it everywhere. Let’s explore how to properly implement Singleton in Go and when it’s actually needed.