CheatCoders - Secret coding knowledge that gives developers an unfair advantage

Memory Management in JavaScript: Garbage Collection, Heap, and Leak Detection

JavaScript manages memory automatically, but leaks still happen. This guide explains how V8 garbage collection works, how to take heap snapshots, detect leaks with Chrome DevTools, and write leak-proof code.

Debugging

CI/CD Pipeline Best Practices: From Code Push to Production in Under 10 Minutes

A slow CI/CD pipeline is a developer productivity killer. These practices — parallel jobs, smart caching, test pyramids, and automated rollbacks — get you from push to production in under 10 minutes reliably.

Debugging

Database Indexing: The Complete Guide to Indexes Every Developer Must Understand

Indexes are the single most impactful database performance tool — and the most misunderstood. This guide explains every index type, when they help, when they hurt, and how the query planner decides to use them.

System Design

API Security Best Practices: How to Secure Your APIs Against Real-World Attacks

APIs are the most attacked surface in modern web applications. This guide covers every real-world attack vector — broken auth, injection, rate limiting bypass, CORS misconfiguration — and the defenses that actually work.

System Design

Recursion Explained: From Base Cases to Tree Traversal to Dynamic Programming

Recursion clicks when you understand three things: the base case, the recursive case, and the call stack. This guide takes you from first principles to tree traversal to full dynamic programming with memoization.

System Design

Redis Mastery: Caching Patterns, Data Structures, and Production Best Practices

Redis is the Swiss Army knife of backend systems — cache, session store, rate limiter, pub/sub, and queue all in one. This guide covers every data structure with production patterns and the pitfalls that cause outages.

System Design

GraphQL vs REST: A Practical Comparison for Production APIs in 2025

GraphQL and REST are not competing philosophies — they solve different problems. This practical guide shows when GraphQL eliminates real pain and when it adds unnecessary complexity.

JavaScript

WebSockets vs Server-Sent Events vs Long Polling: Real-Time Communication Explained

WebSockets, Server-Sent Events, and Long Polling all deliver real-time data but with different trade-offs. This guide shows when each is the right tool — chat, live dashboards, notifications, and collaborative apps.

System Design

Kubernetes for Developers: The Concepts You Must Know to Deploy and Debug in K8s

Kubernetes documentation is written for cluster administrators. This guide is for application developers who need to deploy, configure, and debug their apps in K8s without becoming K8s experts.

JavaScript

Design Patterns in JavaScript: The Gang of Four Patterns Every Senior Dev Uses

The Gang of Four design patterns translated to modern JavaScript — Singleton, Factory, Observer, Strategy, Command, and Proxy with ES6+ class syntax, real use cases, and when NOT to use each.