For example I have a bunch of string of this format "/something/@wherever" "/some/#whatiwant" I'm only interested in what comes after #'s in this case.
For the two suggested duplicates:
Regex: find whatever comes after one thing before another thing
The accepted answer is no where near as succinct as the one I accepted and honestly would have left me confused had I been able to think up a way to search for "regex find whatever comes after one thing before another thing"
Reference - What does this regex mean?
Is a reference manual for regex and not an answer to my question, if it were an answer to my question ALL regex questions should just be sent that direction, and are therefore duplicates.