Why does the following regex not match the last occurrence of the search word?
(?i)(^|,|;)\s*old\s*($|;)
This matches the first and second old, but not the third:
One,old;Two,old;old
^ ^ ^
match match \_ no match
However, if I remove the last ; ((?i)(^|,|;)\s*old\s*$), it does match the last occurrence.
P.S. I'm using Python.
You could capture what comes before it (^|[,;]) match what you want to replace and assert (?=$|;) what should be to the right.
For the comma and the semicolon you can use a character class.
In the replacement use the capture group \1
(^|[,;])\s*old\s*(?=$|;)