Valid case:
- abc123
Invalid case:
- abca123 (a is repeated)
The closest I've got from this answer is /(?=^[A-Za-z0-9]+$)(.)+.*\1.*/, but it is the opposite of what I want, it returns true if there're repeated characters, and false otherwise.
Does anyone know how to write this regex? I.e. only allows [a-z0-9] distinct characters.
