Question

I need a regex to match following strings:

input               --->  output
------------------------------
1*a12*asd*315       ---> a12
113-a12-asd*315     ---> a12
+1-a12-asd-315      ---> a12
as3-a12-asd*315     ---> a12
as3-a12-a           ---> a12
a-a12-a             ---> a12
a-a12-aas           ---> a12
-a12-aas-asd        ---> a12
*a12*aas*asd        ---> a12
a*a12*aas*sd        ---> a12

Hope examples are enough. What I tried is:

(^(?=.{1,3}$)-([a-zA-Z])-(?=.*)$)

but not working? What will be the correct regex for this?

---

for examples I have used a12. It can be anything. I don’t know what the string will be, need to extract that.

Answer 1

You could use an expression like:

([*-])([a-zA-Z\d]+)\1

The desired value will be in the second capturing group after successful match.