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- 0016 let, const and var: variables and scope in JavaScript Use const by default, let when a value must change, and avoid var. The difference is about scope: where a variable is… Beginner · Explains an idea · Any system Article Basics 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
- 0024 TypeScript basics: types, interfaces, unions and narrowing TypeScript adds type annotations to JavaScript and checks them before your code runs. These are the core ideas you need to read… Beginner · Explains an idea · Any system Article Basics 15 Oct 2026
- 0033 The everyday Git workflow: status, add, commit, push, pull Git moves your changes through three places: the working folder, the staging area, and the commit history. These five commands, plus .gitignore… Beginner · Explains an idea · Any system Article Housekeeping · Setup 15 Oct 2026
- 0034 Merging vs rebasing in Git Merge and rebase both bring commits from one branch into another. Merge keeps history exactly as it happened; rebase replays your commits… Intermediate · Explains an idea · Any system Article Branching & rebasing 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
- 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