- Consider all cases when implementing word transformations:
- Zero quantity may need special handling
- Negative numbers
- Decimal numbers
- Language/locale specific rules
- Irregular plurals (e.g., child -> children)
- Words ending in y: only change to 'ies' if preceded by a consonant (e.g., "fly" -> "flies" but "day" -> "days", "key" -> "keys")
- Words ending in s, ch, sh, x: add 'es'
- Special suffixes (-es, -ies)
Simple implementations can lead to bugs. Prefer using established i18n/l10n libraries for production text transformations.
- Avoid quick, simple implementations for language-specific transformations
- Consider edge cases before implementing string manipulation functions
- Document assumptions and limitations in comments
- For text displayed to users, use i18n libraries rather than custom implementations
- Test with a variety of inputs including:
- Empty strings
- Special characters
- Unicode/emoji
- Very long strings
- Different locales