Developer Comparisons
Deep, opinionated guides for the small choices developers make weekly — which UUID version, which JWT algorithm, which hash function, which redirect status. TL;DR tables up top, decision trees at the bottom, no filler.
UUID v4 vs UUID v7: Which One Should You Use as a Primary Key?
UUID v4 is fully random; UUID v7 is time-ordered. This guide explains when each is the right choice — especially for database primary keys, distributed IDs, and analytics keys.
JWT Algorithms: HS256 vs RS256 vs ES256
HS256 is symmetric (shared secret), RS256 and ES256 are asymmetric (public/private keypair). This guide explains when each JWT signing algorithm is the right choice.
MD5 vs SHA-256 vs bcrypt: When to Use Which Hash
MD5 and SHA-256 are fast hashes for fingerprints; bcrypt is a deliberately slow hash for passwords. Using the wrong one is a top security bug — this guide explains when each fits.
HTTP 301 vs 302 vs 307 vs 308: Which Redirect Should You Use?
301 and 308 are permanent; 302 and 307 are temporary. 301 and 302 may change methods; 307 and 308 preserve them. This guide picks the right redirect for every scenario.
camelCase vs snake_case vs kebab-case: When to Use Each Naming Convention
camelCase for JavaScript variables, snake_case for Python and databases, kebab-case for URLs and CSS. This guide gives concrete rules and the historical reasons behind each.