I want to match an optionnal specific pattern after a wildcard, how can I achieve this ?
Here is my test string :
RGF0027_a_Test string_987.test_004.jpg
I want to match the _004, it must be optionnal and it can have any text before that.
Here is my current (not working) regex :
^([a-zA-Z0-9]+)_(a_)?.*(_(\d+))?\.\w+$
Of course the problem is that the .* also match the _004. I think the answer is to use assertions but I'm not really good with them ...
