Django, React, Flutter, Python scripting and more
64 articles
Memory leaks in React applications are often blamed on forgotten event listeners or timers, but stale closures created by React Hooks are another major culprit. Learn how stale closures retain outdated state and objects in memory, why they happen, and how to eliminate them using modern React best.
Your GoRouter redirect logic works perfectly in the emulator but silently does nothing when a real deep link arrives. Here's why it happens and exactly how to fix it without rewriting your routing layer.
Memory leaks in React applications aren't always caused by forgotten event listeners or timers. Stale closures created by React Hooks can keep references to outdated state, props, and objects alive far longer than expected. Learn why stale closures occur, how they contribute to memory leaks,
useReducer is one of React's most powerful state management hooks, but many developers are surprised when reducer state resets after a component re-mount. Learn why state disappears, what causes unexpected re-mounts, and how to preserve application state across renders, navigation, and UI updates.
Your Riverpod provider updates state but the widget stays frozen — no rebuild, no error, just silence. Here are the real causes and fixes for when Flutter widgets refuse to respond to state changes.
Small files upload successfully using Paramiko SFTP, but larger files sometimes fail without obvious errors, resulting in incomplete uploads or corrupted files. Learn why this happens, how to diagnose the root causes, and how to build reliable large-file transfer workflows with Paramiko.
You wrapped a function in useCallback, but child components still re-render on every update. This guide breaks down exactly why useCallback fails silently and shows you the specific fixes that actually stop unnecessary renders.
One of the most common SQL mistakes is comparing NULL values using = NULL instead of IS NULL. The result is queries that silently return incorrect or empty result sets. Learn why SQL treats NULL differently, understand three-valued logic, and write reliable queries that correctly handle missing data
Python loops are easy to write but can become a major performance bottleneck when processing large datasets. NumPy vectorization allows operations to run in highly optimized C code, often delivering speed improvements of 10x, 100x, or even more. Learn how vectorization works and how to transform
Python is one of the world's most popular programming languages, known for its simple syntax, readability, and versatility. Whether you want to build websites, automate repetitive tasks, analyze data, create artificial intelligence applications, or develop games, Python is an excellent place to star
Many developers assume that fetch() throws an error whenever an API request fails. In reality, fetch only rejects promises for network-level failures, allowing HTTP errors like 404 and 500 responses to slip through unnoticed. Learn why bad responses are often silently swallowed and how to build..
Bulk inserts combined with PostgreSQL's ON CONFLICT DO NOTHING can dramatically improve performance and simplify deduplication. However, many developers are surprised when rows silently disappear during large imports. Learn why missing rows occur, how SQLAlchemy handles conflicts, and how to safely