Decorators are one of Python’s most powerful and elegant features. They allow you to modify or extend the behavior of functions and methods — without changing their actual code. If you’ve ever used: …you’ve already used decorators. This article will take you from fundamentals to practical production use. 1. Functions Are First-Class Objects In Python, […]

Modern production software systems—regardless of language or framework—must manage complexity, change, and scale. A proven way to achieve this is by separating concerns into distinct models for business logic, persistence, and external interfaces. This principle originates from Clean Architecture, Domain-Driven Design (DDD), Onion Architecture, and Hexagonal Architecture, and is widely adopted across ecosystems including Java,

Fixing Bottom Navigation Overlap in Android (Gesture Navigation + Edge-to-Edge) While using the LinkedIn Android app recently, I noticed a subtle but important UI issue: The bottom navigation bar was visually overlapping the system back gesture area when gesture navigation was enabled. It wasn’t a crash.It wasn’t a rendering glitch. It was a WindowInsets handling

In object-oriented design, few principles have aged as well as: Favor composition over inheritance. Popularized in Design Patterns, this principle remains foundational across modern ecosystems — from JVM languages to .NET, Python, and Swift. While inheritance models taxonomy, composition models behavior. In practice, behavior modeling is what most real systems need. This article explains why

Singleton behavior is a foundational runtime concept that influences memory usage, identity comparison, concurrency guarantees, and API design. Both Kotlin and Python implement singleton semantics at the language/runtime level — but in different ways and with different guarantees. This article focuses on: Kotlin: Shared Instances and Native Singleton Support 4 1️⃣ emptyList() — Shared Immutable

Kotlin data class, Python @dataclass, Java record, and C# record Boilerplate code is one of the quiet productivity killers in software engineering. It bloats codebases, obscures intent, increases maintenance cost, and—ironically—introduces bugs in code that “should have been trivial.” Modern programming languages have converged on a powerful idea: data-centric types should be concise, immutable by

Running your FastAPI server from the terminal? Your breakpoints won’t work. Here’s how to properly set up debugging in VS Code so you can step through your code with confidence. The Problem You’ve set a breakpoint in VS Code, started your FastAPI server with uvicorn app.main:app, and tested your endpoint through the Swagger docs. But nothing

In relational database systems, deleting data is rarely as simple as removing a row. While SQL provides a straightforward DELETE statement, real-world applications often require stronger guarantees around data recovery, auditing, and referential integrity. This is where the concept of soft delete becomes critical. This article explains what soft delete means, why it is widely

When people talk about AI agents, the focus is usually on models, prompts, or reasoning techniques. But beneath every capable agent is something far less visible—and far more critical: asynchronous execution. AI agents don’t spend most of their time “thinking.”They spend it waiting. Waiting for: If these waits are handled synchronously, the agent blocks. If

Abstract Modern UI frameworks encourage unidirectional data flow, explicit state ownership, and composable architectures. However, when state or callbacks must be passed through multiple intermediate layers that do not directly use them, applications suffer from increased coupling, reduced readability, and poor scalability. In React, this issue is commonly referred to as prop drilling.In Jetpack Compose,