Is this possible with sed?
I'm actually in iTunes using "Track Name Edit with sed" from Doug's Scripts, and I have a collection of tracks that are titled in one of two ways:
Identical string - Identical string
Some string - some different string
In the first case, I want to remove one of the identical strings and the middle
- so I am left with just a single iteration of the "Identical string." If the strings are different (second case), I want to leave it alone.
s/^(.*) - $1/$1/, but it appears I can't match to a group I just defined.
s/^(.*) - (.*)/$1/ will work for the first case, obviously, but will incorrectly process for the second case. Is there another way around this using the tools I've mentioned?