Disclaimer: This question is more from curiosity and will to learn a bit more about Regex, I know it can be achieved with other methods.

I have a string that represents a list, like so: "egg,eggplant,orange,egg", and I want to search for all the instances of the item egg in this list.

I can't search for the substring egg, because it would also return eggplant.

So, I tried to write a regex expression to solve this and got to this expression ((?:^|\w ,)egg(?:$|,\w )) (I used