Linux

441 entries match these filters

• 0023 Run async tasks with a concurrency limit A small mapLimit helper that runs an async function over many items with at most N in flight, keeps result order, stops… Advanced · Step by step · Any system Script Async code 15 Oct 2026
• 0025 Regular expressions cheat sheet (JavaScript flavor) The regex syntax you actually use, from character classes and quantifiers to groups, lookarounds and flags, with the JavaScript methods that apply… Beginner · Cheat sheet · Any system Article Basics · Basics 15 Oct 2026
• 0015 Ruff: Python linter and formatter Ruff is a fast Python linter and code formatter written in Rust. It catches bugs such as undefined names and unused imports… Any system Repo Common errors · Testing 15 Oct 2026
• 0032 First-time Git setup: name, email, default branch, SSH or HTTPS Tell Git who you are, pick sensible defaults, and choose between SSH and HTTPS for GitHub. Includes a small script that applies… Beginner · Step by step · Linux, macOS, Windows Script Setup 15 Oct 2026
• 0026 Fix: TypeError: Cannot read properties of undefined (reading ‘x’) You tried to read a property from a value that is undefined or null. Find which value is missing, then guard it… Beginner · Fixes an error · Any system Article Basics · Common errors 15 Oct 2026
• 0028 Node.js The source of the Node.js runtime: a JavaScript engine (V8) plus APIs for files, networking, processes and more, used to run JavaScript… Linux, macOS, Windows Repo Node.js 15 Oct 2026
• 0027 Fix: SyntaxError: Cannot use import statement outside a module The file uses ES module import syntax, but Node or the browser is loading it as a classic script or CommonJS. Tell… Intermediate · Fixes an error · Any system Article Common errors · Node.js 15 Oct 2026
• 0029 TypeScript Microsoft's TypeScript language and compiler: typed JavaScript that compiles to plain JavaScript, plus the language service that powers editor features. Any system Repo Basics 15 Oct 2026
• 0001 Virtual environments with venv A virtual environment is a private folder of Python packages for one project, so projects never fight over versions. Create one with… Beginner · Explains an idea · Any system Article Environments & packages 15 Oct 2026
• 0002 Python cheat sheet: strings, lists, dicts and f-strings The everyday methods for text, lists and dictionaries, plus f-string formatting and comprehensions, each with a one-line example you can paste into… Beginner · Cheat sheet · Any system Article Basics 15 Oct 2026