How to find the offset of the last instance of a repeating character in a string?

[Keith Clarke]

Folks,
Is there a simple way to find the offset of a character from the ‘right’ end of a string, rather than the beginning - or alternatively get a list of all occurrences?

I’m trying to separate paths & pages from a list of URLs and so looking to identify the position of the last ‘/‘ character.

Thanks & regards,
Keith