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303 entries match these filters
- 0017 JavaScript array methods cheat sheet: map, filter, reduce and friends A quick reference for the array methods you use every day, with what each one returns and whether it changes the original… Beginner · Cheat sheet · Any system Article Basics 15 Oct 2026
- 0035 Undoing changes in Git: restore, reset, revert, and reflog Pick the undo command by where the mistake lives: in a file, in the staging area, in a local commit, or in… Intermediate · Explains an idea · Any system Article Undoing changes 15 Oct 2026
- 0018 Promises and async/await explained A promise is a placeholder for a value that arrives later. async/await lets you write code that waits for promises as if… Intermediate · Explains an idea · Any system Article Async code 15 Oct 2026
- 0036 Finding the commit that broke it: log, blame, and git bisect When something used to work and now does not, Git can point at the commit that changed it. Start with log and… Advanced · Step by step · Any system Article Finding bugs · Reading history 15 Oct 2026
- 0019 fetch with timeout, retries and proper error handling A reusable fetchJson helper for Node 20+ and browsers that adds a timeout, retries with backoff for temporary failures, and clear errors… Intermediate · Step by step · Any system Script Async code · Making requests 15 Oct 2026
- 0020 Debounce and throttle functions in plain JavaScript Two small dependency-free helpers that limit how often a function runs: debounce waits for a pause, throttle runs at most once per… Intermediate · Step by step · Any system Script Patterns 15 Oct 2026
- 0011 Bootstrap a new Python project with a venv A Bash script that creates a project folder with a virtual environment, .gitignore, requirements.txt and a starter main.py, then runs it to… Intermediate · Step by step · Linux, macOS Script Environments & packages 15 Oct 2026
- 0004 Logging instead of print The logging module gives every message a level, a timestamp and a destination you can change without editing code. It is the… Intermediate · Explains an idea · Any system Article Files & automation 15 Oct 2026
- 0021 Read and write files in Node.js with fs/promises A complete Node script that walks a folder, reads text files, and writes a JSON report safely, showing the everyday fs/promises calls… Beginner · Step by step · Any system Script Node.js 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