nice one but hard to read...

would be gr8 to explain ur code

clever, but overuse of ternary operator, and alot harder to read than a switch.

Would be usefule to add a comment explaining your regex briefly. This would allow a different dev to understand your thought process

Agreed!
It's a very clever solution, but could have been optimized for performance as you state.

Thank you so much, Voile!