Home Regex exclude matches where last two characters of string are combination of – and number

Regex exclude matches where last two characters of string are combination of – and number

March 18, 2022

Tried with [^-][^0-9]$, but this also excludes d9 or -a. I would like this to only work with -1, -2, -3 etc.

You can use an NFA regex with lookbehind support like

$(?<!-[0-9])

It matches an end of string that is not immediately preceded with a - + a digit.

A variation of this is

^(?!.*-[0-9]$)
^(?!.*-[0-9]$).*

If you deal with a POSIX (ERE here) regex engine, you can use

^(.*([^-].|.[^0-9])|.)$

See this regex demo. Details:

^ – start of string
( – start of a group:
- .* – any zero or more chars
- ([^-].|.[^0-9]) – either a char other than a - and then any one char, or any single char and then any char other than a digit
| – or
- . – any one char
) – end of the group
$ – end of string.