- Console with locale timestamp
- Expressing file size in a unit system
- Escapes and unescapes the characters for HTML
- Verify ISBN string format and check digit
- Parsing a PA-API 5.0 Item Image URL
- Converts newlines in a string,
trim(), half-width / full-width conversion, etc - Support characters other than "&" as URL query separator
- Obtain Japanese calendar from Western calendar data（西暦データから和暦を取得）