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10 entries match these filters

• 0075 CSV to JSON converter (Python, standard library) Convert any CSV file with a header row into a JSON array or JSON Lines. Handles quoted fields, a byte order mark,… Beginner · Step by step · Any system Script CSV & JSON · Files & automation 15 Oct 2026
• 0084 Tiny JSON echo server for testing HTTP clients A standard-library Python server that echoes back the method, path, query, headers, and body of every request, and can return any status… Intermediate · Step by step · Any system Script Files & automation · Making requests 15 Oct 2026
• 0085 fetch with timeout, retries, and exponential backoff A drop-in fetch wrapper that times out slow requests, retries network errors and 429/5xx responses with jittered exponential backoff, and honors Retry-After. Advanced · Step by step · Any system, Browser Script Async code · Making requests 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
• 0022 Build a small Node.js CLI with util.parseArgs A complete, dependency-free command-line tool in Node: options and flags with parseArgs, input from files or a pipe, help text, and meaningful… Intermediate · Step by step · Any system Script Node.js 15 Oct 2026
• 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
• 0009 CSV to JSON converter A small command-line tool that turns a CSV file into a JSON array of objects, with optional number detection, custom delimiters and… Beginner · Step by step · Any system Script CSV & JSON · Files & automation 15 Oct 2026
• 0010 Find duplicate files by content Scans folders and lists files with identical content, using file size first and SHA-256 hashes second. It is read-only and only reports… Intermediate · Step by step · Any system Script Files & automation 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