Regex exclude criteria

Question

After some tries I have created the follow regex:

/([^\w][[:alnum:]]*\.)/g

That matches results as this image:

In the secod case, pointed by red arrow I got "=U." as match, but I only want "U." (rather if without spaces before) and "A2." - how can I exclude "=" (equal) char from match criteria?

See the live example: http://regex101.com/r/cI9fL1

Answer 1

You probably want to use a lookbehind:

/(?<=\W)([[:alnum:]]*\.)/