How to Choose a Secure PIN Code (and Remember It)
How to choose a secure PIN code for your phone, bank card or alarm: patterns to avoid, why length matters, and simple tricks to remember a random PIN.
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Guides on test data, international formats, privacy, passwords and probability.
Diceware Passphrases Explained: Why Words Beat Symbols
Diceware passphrases explained: how random words create strong, memorable passwords, how word lists turn into bits of entropy, and how many words you need.
Localhost Ports Explained: Picking One for Dev Servers
Localhost ports explained: what port numbers mean, which ranges are safe for dev servers and containers, and how to fix “address already in use”.
How to Read a User Agent String, Token by Token
Learn how to read a user agent string: what Mozilla/5.0, AppleWebKit and KHTML mean, why every browser claims to be Safari, and how to test UA parsing.
How to Choose a Domain Name: A Practical Checklist
How to choose a domain name for a startup, blog or side project: a checklist on length, spelling, extensions and brand checks before you register.
Anatomy of a URL: Scheme, Host, Path and Query
The anatomy of a URL explained: scheme, host, port, path, query string and fragment, with encoding rules and edge cases every developer should test.
File Naming Conventions: Best Practices That Scale
File naming conventions that scale: how to choose a case style, date files so they sort, avoid forbidden characters and keep shared folders easy to search.
How to Mock API Data With JSON Before the Backend Exists
How to mock API data with JSON: build front ends before the backend is ready, write fixtures that catch bugs, and avoid the classic mistakes in fake data.
Semantic Versioning Explained: When to Bump What
Semantic versioning explained: when to bump major, minor or patch, how pre-release tags like alpha and rc sort, and what version ranges like ^1.2.0 mean.
How to Write Good Commit Messages (With Examples)
How to write good commit messages: the 50/72 rule, imperative mood, Conventional Commits types and before-and-after examples for a cleaner Git history.
Hash Functions Explained: MD5, SHA-1 and SHA-256
Hash functions explained in plain English: how MD5, SHA-1 and SHA-256 work, why outputs have fixed lengths, and which ones are still safe to use today.
Nano ID vs UUID: Which Unique ID Should You Use?
Nano ID vs UUID compared: length, alphabet, collision risk and URL friendliness, plus a simple guide to choosing the right unique ID for your app.
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