Bài viết

Phân Tích Chuyên Sâu Về Kỹ Thuật

Những bài phân tích chuyên sâu, thực tế về cách phần mềm vận hành và cách các đội xây dựng nó: có câu trả lời ngay đầu bài, sơ đồ khi cần và nguồn cho mọi nhận định.

AI & Kỹ thuật27 thg 10, 20269 phút đọcTiếng Anh

AI Makes Writing Code Cheaper. It Does Not Make Engineering Judgment Cheaper.

AI assistants cut the cost of producing code, but not of verifying, reviewing and owning it. What the research shows, where the bottleneck moves and how teams should adapt.

AI
Teams
Code Review

Lãnh đạo kỹ thuật20 thg 10, 202612 phút đọcTiếng Anh

The Metrics That Make Engineering Organizations Worse

Lines of code, story points and pull-request counts reward the wrong behavior. Why vanity metrics backfire, and how to measure outcomes, flow and health without gaming.

Teams
Metrics
Productivity

JavaScript13 thg 10, 202610 phút đọcTiếng Anh

Race Conditions in JavaScript: When Single-Threaded Code Is Not Safe

JavaScript runs one thing at a time, yet async code still races. Lost updates, stale responses and double submits, and the patterns that prevent each one.

JavaScript
Async
Concurrency

Lãnh đạo kỹ thuật6 thg 10, 202611 phút đọcTiếng Anh

Technical Debt Is Not the Enemy. Unpriced Technical Debt Is.

Debt is a tool when you know its cost. How to measure technical debt through change cost, risk and toil, decide what to pay down, and talk about it in terms the business funds.

Teams
Architecture
Maintenance

JavaScript29 thg 9, 202610 phút đọcTiếng Anh

From Call Stack to Heap: How JavaScript Manages Memory

Where values live, how the garbage collector decides what to free, why reachability is the only rule that matters, and how to find and fix the leaks it can’t.

JavaScript
Runtime
Performance

Kiến trúc & Hệ thống22 thg 9, 202610 phút đọcTiếng Anh

Distributed Systems Fail in the Gaps Between Teams

Most outages start where one team’s service meets another’s. Contracts, timeouts, retries and ownership that stop one slow dependency from taking everything down.

Distributed Systems
Reliability
Architecture

JavaScript8 thg 9, 20268 phút đọcTiếng Anh

How Promises and async/await Actually Work

Promise states, chaining, adoption, error propagation and microtask timing, then what async/await compiles to. With the ordering rules and the mistakes they explain.

JavaScript
Async
Runtime

JavaScript1 thg 9, 20269 phút đọcTiếng Anh

Scope, Hoisting and the Temporal Dead Zone in JavaScript

The five kinds of scope in JavaScript, how name lookup works, what hoisting really does to var, let, const, functions and classes, and why the temporal dead zone exists.

JavaScript
Fundamentals
Language Internals

Kiến trúc & Hệ thống25 thg 8, 202613 phút đọcTiếng Anh

The Architecture Decisions That Matter More Than Your Tech Stack

Coupling, boundaries, data ownership and independent deployment decide how fast a system can change. How to recognize those decisions and make them deliberately.

Architecture
System Design
Teams

JavaScript18 thg 8, 20269 phút đọcTiếng Anh

JavaScript’s this Keyword, Four Rules and One Exception

this depends on how a function is called, not where it is written. Four call-site rules, the arrow function exception and how to fix a lost this in callbacks.

JavaScript
Frontend
Fundamentals

JavaScript11 thg 8, 202610 phút đọcTiếng Anh

The Event Loop Is Not What You Think: Tasks, Microtasks and Order

How the call stack, task queue, microtask queue and rendering fit together, how to predict execution order, and why a busy loop or a promise chain can freeze the page.

JavaScript
Runtime
Performance

JavaScript4 thg 8, 20267 phút đọcTiếng Anh

Why JavaScript Equality Is More Complicated Than == vs ===

JavaScript has four equality algorithms. How == coerces, why NaN and -0 break ===, what Object.is and SameValueZero do, and which one Map, Set and includes use.

JavaScript
Fundamentals
Language Internals

JavaScript28 thg 7, 20267 phút đọcTiếng Anh

What Happens When a Function Runs: Execution Contexts and Closures

Execution contexts, lexical environments, the scope chain and closures, explained as one model, with the loop and memory pitfalls it explains.

JavaScript
Fundamentals
Language Internals

JavaScript21 thg 7, 20267 phút đọcTiếng Anh

How JavaScript Modules Work: Scope, Live Bindings and Cycles

ES modules and CommonJS load, share and evaluate code differently. Live bindings, singletons, circular imports and the rules that decide what you actually get.

JavaScript
Modules
Node.js

JavaScript14 thg 7, 20267 phút đọcTiếng Anh

The Hidden Cost of Mutable State in JavaScript

Aliasing, shallow copies and in-place methods cause bugs that show up far from their cause. How references work, and when to copy, freeze or isolate state.

JavaScript
Fundamentals
State Management

JavaScript7 thg 7, 20268 phút đọcTiếng Anh

What Happens When You Read a Property in JavaScript

Property descriptors, getters, setters and the prototype chain explained through one lookup algorithm, with the shadowing rules that surprise people.

JavaScript
Fundamentals
Language Internals