Convert Unix file permission modes between symbolic forms like rwxr-xr-x and octal values like 755.
Decode a five-field cron schedule into a readable summary and the next upcoming run times from the current moment.
Map an HTTP status code to its reason phrase and a short explanation for debugging APIs and browsers.
Check whether one semver string is greater than, less than, or equal to another, with numeric major/minor/patch deltas.