Once in HN comments I saw `sed` referred to as a one-way hashing function, and that's always stuck with me - not just for sed, but for any type of operation tha

Once in HN comments I saw `sed` referred to as a one-way hashing function, and that's always stuck with me - not just for sed, but for any type of operation that ends up being sort of a "black box". Input becomes output reliably, but it's hell to understand how. My big take away was: These types of operations are OK, when necessary, but it's a good idea to take the time to write some comments/documentation so the next person who looks at it (including self) has somewhere to start. That said, debugging is definitely a thing, and tools like this are awesome!