What are scars useful for? : <p>In the paper titled "The Zipper" by Huet, he also mentions scars as a variation of zippers. Compared to zippers, which became pretty well known in the Haskell community, scars are pretty much unheard of. There is very little information about them in the paper itself and anywhere on the internet from what I could find.</p>

<p>So I have to ask, are they just not useful at all or is there something they are useful for, but most people just don't know about them?</p>
