How to test characters of a string

[Christian Gollwitzer]

Am 09.06.22 um 07:50 schrieb Dave:
> Hi,
> 
> I’ve found you also need to take care of multiple disk CD releases. These have a format of
> 
> “1-01 Track Name”
> “2-02  Trackl Name"
> 
> Meaning Disk 1 Track1, Disk 2, Track 2.
> 
> Also A and B Sides (from Vinyl LPs)
> 
> “A1-Track Name”
> “B2-Track Name”
> 
> Side A, Track 1, etc.
> 

Now you're getting into the complexity that is better handled by REs 
than by individual character examination.
The first of your formats matches the RE

	\d-\d{2}

(one digit, - two digits). Anchor that to check for a match at the 
beginning.

The second one matches

(A|B)\d-

As long as one digit is enough. What is your goal, to extract these 
numbers or to strip them? Regexes can do both relatively easily.

	Christian