Exactly my point. In the second case the two lines are also not the product, but it’s heavily implied that the dam, bridge is something useful, while the python code is useless. There are many examples where the opposite is the case
When I had a ceph cluster setup with a star network of routed gigabit connections between servers I was giddy with excitement watching the throughput, and even more excited when I spotted one of the cables was bad and only able to pass traffic in one direction but the routing protocol still used the available bandwidth and work around the bad link in the opposite direction.
Rust borrows a lot of it’s design from functional programming languages like Haskell, which has its good and bad. You could also choose to implement this behavior iteratively like typical C programs, but that tends to be ugly in other ways.
Personally, I’ve grown fond of the functional style. You see it in other places too, like the higher order functions in JavaScript. What’s good about them in Rust is you still get amazing performance due to zero-cost abstraction. Trying to implement it yourself would likely be slower, so use them any chance you get.
It is simpler to bang out a [int(num) for num in text.splitlines()[0].split(’ ')[1:]] in Python, but that just shows the happy path with no error handling, and does a bunch of allocations that the Rust version doesn’t. You can also get slightly fancier in the Rust version by collecting into a Result for more succinct error handling if you’d like.
EDIT: Here’s also a version using anyhow for error handling, and the aforementioned Result collecting:
Yeah I was trying to do something like reading the first line by getting an iterator and just looping through the other lines normally, since first line was kind of a special case but it got messy quick. I realized halfway that my collects were redundant but couldn’t really simplify it. Thanks
I don’t think it would be readable. Too much going on. You’d need an outer iter over lines, an inner over words, a check for number and a conversion. And there would be zero error handling.
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