this post was submitted on 07 Apr 2024
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[–] [email protected] 26 points 7 months ago

Finally, pure functional rust.

[–] [email protected] 24 points 7 months ago (3 children)

Neat FP style. Pretty verbose though. Someone should invent a terser syntax so you don't need to write do_two_things everywhere. It's a common operation so maybe it could even be a single character.

[–] [email protected] 7 points 7 months ago

If you know about rust you know it's a programmable programming language, meaning that you can make macros. There could be a macro that would do that but 1. Macros is rust code to write rust code so they have the complexity of rust squared 2. I said to myself the only macros I will allow myself to use in this challenge is println and allow

[–] [email protected] 7 points 7 months ago

Like a semicolon? No, too boring. What about >>=

[–] [email protected] 5 points 7 months ago

; is just a monad after all

[–] [email protected] 15 points 7 months ago (1 children)

Isn’t this basically how lisp works?

[–] [email protected] 1 points 7 months ago

Yup! Also languages in the ML family and others I'm sure.

[–] [email protected] 12 points 7 months ago (2 children)

Yeah, semicolons are ugly anyway and they'd ruin the beautiful expression of your code.

[–] [email protected] 7 points 7 months ago (3 children)

On a more serious note, does rust suffer some of the same issues as JavaScript when it comes to omitting semicolons?

[–] [email protected] 10 points 7 months ago
[–] [email protected] 7 points 7 months ago (2 children)

Do not expect to find anything like Javascript craziness on other languages. Or you'll be severely disappointed.

[–] [email protected] 4 points 7 months ago (1 children)

There are plenty of languages with warts at least as bad as JavaScript's. Bash, PHP, C, even relatively sane languages like Python still have huge issues like implicit variable declaration.

[–] [email protected] 6 points 7 months ago (1 children)

JS and PHP are by themselves in a special ring of hell.

[–] [email protected] 1 points 7 months ago

Bash is a bigger one. Luckily there's nushell

[–] [email protected] 4 points 7 months ago (1 children)
for (const item in items) { }

!=

for (const item of items) { }
[–] [email protected] 2 points 7 months ago

Still better than

for _, item in ipairs(items)
[–] [email protected] 4 points 7 months ago

Nope. In Rust, a semicolon denotes a statement while a lack of semicolon is an expression so you can't just omit them at will. This does lead to cool things though like if/else blocks being able to produce values if they end in an expression. But the expression type is checked so you're less likely to make a mistake. You can see an example here: https://doc.rust-lang.org/rust-by-example/flow_control/if_else.html

In JavaScript I never skip semicolons because I've seen those subtle bugs.

[–] [email protected] 3 points 7 months ago

POV: your project manager went in an "cleaned" it all up by removing them - your (sic) welcome! 😜

[–] [email protected] 12 points 7 months ago (2 children)

Now do it without using commas

[–] [email protected] 7 points 7 months ago

Challenge accepted! If I won't procrastinate from this procrastinating, tomorrow will be a version 2 without commas!

[–] [email protected] 5 points 7 months ago (1 children)

After programming in Go for nearly a decade, the idea of going back to needing semicolons brings me pain. Rust seems cool, but semicolons 🤢

[–] [email protected] 8 points 7 months ago (2 children)

As you can see, rust allows you to not put semicolons at the end of code blocks. The presence of semicolons is not a language killer. It's a very hard language, but its worth it.

[–] [email protected] 4 points 7 months ago

I agree. Semicolons are a small "tradeoff" (personally not for me) for such a great language.

[–] [email protected] 2 points 7 months ago

The presence of semicolons is not a language killer.

I'm not saying it is. But every time I have to work in a language that requires semicolons I'm constantly forgetting them and constantly reminded of how nice it is to not have to care in Go.

[–] [email protected] 3 points 7 months ago (1 children)

Would you rather have semicolons or significant newlines?

[–] [email protected] 5 points 7 months ago

Semicolons. Statement's can be written in multiple lines such as rust io::stdin(&mut foo) .unwrap(). Idk if it would work if the newlines were significant. Also when I paste something, it could be ready hard for the formatter to format it.

[–] [email protected] 3 points 7 months ago

Rust's semicolon means something like "There's nothing to see here! Move along! Move along!", so yeah, you don't actually need any.

[–] [email protected] 3 points 7 months ago (1 children)
[–] [email protected] 3 points 7 months ago (1 children)
[–] [email protected] 1 points 7 months ago

How did I not recognize the font I've been using for years, lol. Guess it just looks even better on a HiDPI display.

[–] [email protected] 2 points 7 months ago

Well you have a variable foo being mutated. Maybe that's what they're for?

[–] [email protected] 2 points 7 months ago* (last edited 7 months ago) (1 children)

~~You can replace return foo with just foo.~~

[–] [email protected] 4 points 7 months ago (1 children)

Not here, because it's being used as a function argument.

[–] [email protected] 3 points 7 months ago

Oh wow. I hate this lol