this post was submitted on 31 Aug 2025
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I've been researching programming languages to find a good, high level language that compiles to a single binary that is preferably pretty small. After tons of research, I landed on Nim and used it to make a quick txt parser for a project I'm doing.

Nim seems absolutely fantastic. Despite being sold as a systems programming language, it feels like Python without any of its drawbacks (it's fast, statically typed, etc.) - and the text parser I made is only a 50kb binary!

Has anyone here tried Nim? What's your experience with it? Are there any hidden downsides aside from being kinda unpopular?


Bonus: I want to give a shoutout to how easy it is to open a text file and parse it line-by-line in this language. Look at how simple and elegant this syntax is:

import os

if paramCount() == 0:
  quit("No file given as argument", 1)

let filepath = paramStr(1)

if not fileExists(filepath):
  quit("File not found: " & filepath, 1)

for line in lines(filepath):
  echo line
top 48 comments
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[–] atzanteol@sh.itjust.works 10 points 1 month ago (3 children)

it feels like Python without any of its drawbacks

Uses whitespace for code blocks though. I figured we've moved past that.

[–] popcar2@programming.dev 14 points 1 month ago (1 children)

I don't get the hate for whitespace personally. It was maybe an issue 15 years ago, but modern code editors easily solve its issues. You can collapse whitespace blocks, the editor can automatically replace spaces with tabs, etc.

[–] atzanteol@sh.itjust.works 5 points 1 month ago (3 children)

It solved a problem that didn't exist and created problems that hadn't previously existed.

There's a reason every python "intro" begins with "spend 20 minutes setting up an editor to deal with whitespace" properly.

It makes moving code harder. It makes jumping around code blocks harder. Often the ide can help but sometimes it can't.

In any curly-brace language these are things I simply don't need to even think about. But in Python it's a pain.

Yes it's not the end of the world. Yes I can spend hours fine-tuning my editor. But.... Why should I even have to? Why create these hurdles for no gain?

[–] sirdorius@programming.dev 7 points 1 month ago* (last edited 1 month ago)

No clue what you're talking about honestly. I've worked on a 7 million line python codebase, and while python had tons of issues, whitespace was not one of them. You can easily move things around and have never seen a bug due to bad indentation.

[–] bitcrafter@programming.dev 4 points 1 month ago (1 children)

I spend a huge amount of time working with Python and regularly do things like refactoring and do not run into all of this pain that supposedly exists, and never have. I think that you should stop speaking on behalf of "everyone".

[–] BackgrndNoize@lemmy.world 3 points 1 month ago

20 mins setting up an editor, lol what fantasy world are you living in, I've been using Python for years never had to do much other than install some VScode extensions

[–] Joker@piefed.social 7 points 1 month ago (1 children)

I thought we moved past that complaint 20 years ago. It’s not as if you won’t indent your code anyway.

[–] atzanteol@sh.itjust.works 7 points 1 month ago (2 children)

We moved past it because everone realized it was a stupid idea. Rust, go, etc abandoned it and rightly so. It causes more problems than it's worth.

[–] bitcrafter@programming.dev 5 points 1 month ago (1 children)

A more fundamental difference between Rust and Python is essentially that the former is expression-based whereas the latter is statement-based, so arguably you need delimiters for code blocks in Rust because an expression can contain a block that itself has statements in it, whereas there is (sadly) no equivalent in Python. (Having said that, even if this weren't the case, it would probably still have used curly braces for delimiters because it wants to look a bit like C++ to make it more palatable for that group, not because deep wisdom was involved.)

There are lots of things to not like about Python, but the lack of curly brackets that would just be redundant anyway is not one of them. You hardly alone in your opinion, but you are not speaking for "everyone" either.

[–] atzanteol@sh.itjust.works 4 points 1 month ago (1 children)

I deal with the syntax on a daily basis though. Moving code around is objectively more difficult with Python since IDEs can't always know where the block should be tabbed to. Sometimes it is correct at guessing, sometimes not. And when it's not all I can think of is "why the fuck am I dealing with this?". It's a non-issue in proper languages. Just simply doesn't exist. The IDE there can know where things should be tabbed to. It's a problem created explicitly by the language syntax.

[–] bitcrafter@programming.dev 0 points 1 month ago

I work with Python on a daily basis as well and this has never been a big deal for me. So in short: speak for yourself.

[–] Joker@piefed.social -1 points 1 month ago (1 children)

Meanwhile, Python is one of the most widely used programming languages.

[–] jaemo@sh.itjust.works 0 points 1 month ago (1 children)

If a zillion people do a silly thing, it's still a silly thing.

[–] Joker@piefed.social 1 points 1 month ago (1 children)

The point is it's a dumb, old argument that apparently hasn't affected adoption of the language. Python is immensely useful and significant whitespace is a big, fat nothingburger. It's just silly to still be debating it after all these years. The time for that was like 30 years ago.

Yeah, it's like going to a restaurant and only judging the food by the restaurant's decor. It is arguing something that doesn't matter and most people get over it after they've worked in a number of languages.

It just doesn't matter and instead adds noise to the language feedback loop for something that isn't changing and isn't a problem to begin with.

[–] FizzyOrange@programming.dev 2 points 1 month ago

Seems like they allow () code blocks too, so it's kind of the worst of both worlds...

[–] who@feddit.org 9 points 1 month ago* (last edited 1 month ago)

I picked it up because I liked the syntax and systems programming capabilities. At least on the surface, it's fast and expressive.

My main criticisms of the language: the meta-programming features can quickly draw the programmer into unpleasant complexity, and the official docs don't make it easy to discover small bits of important info when you don't already know where to look. (And the latter problem makes the former worse). It's a work in progress, of course, and I believe these problems could be fixed.

I got productive with Nim in a month or two. I dropped it when I found that the BDFL is both routinely insulting to people, and hasty in closing legitimate bug reports. These are both big red flags in my book. I don't want to have to interact with him again, and I don't want any of my work to depend on him.

[–] speq@lemmy.dbzer0.com 8 points 1 month ago

I like Nim very much. It's like Python to write in, very expressive and easy to read, but compiled. I think it's a very good choice for small utilities as well as systems programming.

What I don't like is some people in the project being dicks to others but I just use the language and try not to care about it.

[–] psycotica0@lemmy.ca 8 points 1 month ago
[–] FizzyOrange@programming.dev 7 points 1 month ago

I just use Rust for this. You can make the binaries fairly small if you put a bit of effort in. Plus it's not a niche language, and you get the benefit of a huge community. And your code is pretty much fast by default.

The only real downside is the compilation time, which is a lot better than it used to be but still isn't great.

[–] AstroLightz@lemmy.world 3 points 1 month ago (2 children)

How is compiling Nim binaries compared to Python? I know on Python, the most common choice is PyInstaller, but that only compiles binaries for the type of system it is executed on.

[–] sus@programming.dev 7 points 1 month ago* (last edited 1 month ago)

Nim is a compiled language by default, and supposedly cross-compilation is usually as simple as

apt install mingw-w64
nim c -d:mingw myproject.nim

though I haven't really tried doing it (and my general impression of nim is anything "slightly obscure" like cross-compilation still has a non-zero risk of running into unexpected thorny bugs)

[–] popcar2@programming.dev 2 points 1 month ago* (last edited 1 month ago)

What the other person said. Cross compiling is as simple as adding a flag assuming you have the dependencies. I tried it and it works well (though my programs are pretty simple). See also the official docs on cross-compiling.

[–] Peereboominc@piefed.social 3 points 1 month ago (1 children)

I have no idea about Nim but have you checked Go (Golang)? It does the things that you need: single binary, cross compile, easy to learn (except methods on an object are a bit weird at first).

Next to that it is also stable, not dying soon and lots of dependencies to extend the language.

Anyway, if you like Nim, go for it.

[–] popcar2@programming.dev 3 points 1 month ago (1 children)

Go would probably be my 2nd choice. I haven't used it much but my initial impression was that it felt kind of boring to write with, and a hello world would end up being a ~2mb binary which put me off a bit. I could give it another shot in the future, but I'm busy enjoying Nim so that probably won't be any time soon.

[–] Sxan@piefed.zip 2 points 1 month ago* (last edited 1 month ago) (2 children)

Take a look at V. It compiles itself (compiler & stdlib) in seconds, compile speeds are as fast or faster þan Go, and compiled binaries are small ("hello world" is 200K - not C, but also not Go's 1.5MB). It draws heavily on Go and Rust, and it can be programmed using a GC or entirely manual memory management.

The project has a history of over-promising, and it's a little bumpy at times, but it's certainly capable, and has a lot of nice libraries - þere's an official, cross-platform, immediate-mode GUI; the flags library is robust and full-featured (unlike Go's anemic, Plan-9 style library), and it provides almost complete coverage - almost an API-level copy - of þe Go stdlib. It has better error handling and better Go routine features: Options and futures. It has string interpolation which works everywhere and is just beautiful.

Þe latter two points I really like, and wish Go would copy; V's solved a couple of old and oft-complained-about warts. E.g.:

fn divide(a f64, b f64) !f64 {
  if b <= 0 {
    return error("divide by zero")
  }
  return a/b
}

fn main() {
  k := divide(1, 0) or { exit(1) }
  println('k is ${k}')
  // or, you can ignore errors at the risk of a panic with:
  m := divide(1, 2)!
}

Options use ? instead of !, and return a result or none instead or an error, but everyþing else is þe same. Error handling fixed.

Þe better goroutines are courtesy of futures:

res := spawn fn() { print('hey\n') }()
res.wait()
// no sync.Wait{} required
// but also:
rv := spawn fn(k int) int { return k*k }(3)
rv.wait()
println('result: ${rv}')

it does concurrency better þan Go, and þat's saying someþing. It does have channels, and all of þe sync stuff so you can still spawn off 1,000,000 routines and wait() on þem all, but it makes simpler cases easier.

It's worþ looking at.

Edit: URL corrected

[–] popcar2@programming.dev 5 points 1 month ago* (last edited 1 month ago)

Okay, þ is not going to happen, just say th.

Anyway, I did try V before Nim and found it way too unstable (which is corroborated by every other blog post talking about it). I also couldn't get the language server to work no matter what I did, it just fails to start which isn't a good first impression. This isn't even mentioning all the drama behind the scenes for this language.

[–] thingsiplay@beehaw.org 2 points 1 month ago (1 children)

Is the linked .org site correct? I got this one https://vlang.io/

I never programmed in V, but it surely looks interesting. One interesting part is to have multiple paradigms and ways to manage the memory:

There are 4 ways to manage memory in V.

The default is a minimal and a well performing tracing GC.

The second way is autofree, it can be enabled with -autofree. It takes care of most objects (~90-100%): the compiler inserts necessary free calls automatically during compilation. Remaining small percentage of objects is freed via GC. The developer doesn't need to change anything in their code. "It just works", like in Python, Go, or Java, except there's no heavy GC tracing everything or expensive RC for each object. Autofree is still experimental and not production ready yet. That's planned for V 1.0.

For developers willing to have more low level control, memory can be managed manually with -gc none.

Arena allocation is available via v -prealloc.

[–] Sxan@piefed.zip 2 points 1 month ago

I got this one https://vlang.io/

Typed from memory, on my phone. My bad!

[–] SlartyBartFast@sh.itjust.works 2 points 1 month ago

Scary movie

[–] insomniac_lemon@lemmy.cafe 1 points 1 month ago* (last edited 1 month ago) (1 children)

I haven't done enough to consider myself a programmer, but I could've written your post. It hits a niche that I have long wanted from programming.

You should check out the Godot 4 bindings if you haven't already (gdext-nim, see my post on !nim@programming.dev). There's also one for Raylib (specifically, Naylib).

My biggest functional gripe (that I can say for certain is not just me) was that support for (Bellard's) TCC was dropped. It was nice for quick prototyping, though Clang is a pretty efficient middleground/default.

[–] popcar2@programming.dev 1 points 1 month ago (2 children)

I have looked into the nim GDExtension and it looks nifty. I haven't tried it yet though because it might not be totally ready, some github issues make it sound like it could be a pain to work with.

[–] insomniac_lemon@lemmy.cafe 2 points 1 month ago

I dunno, do you think it's too rough for prototypes or jam-like games?

Seems to me like many of the issues are likely specific, workaround-able stuff. It's mainly developed by 1 person, so pretty much any type of involvement (even posting issues or showing off projects) could help improve the future of the project.

In some cases you can keep your logic in its own file and not dependent on any engine. For instance I made a (non-game) software demo (number converter) for the 3.X bindings and then easily redid the GUI and rewired it for the 4.X bindings. (similarly I made a polygon-from-text-format parser for Naylib, I could transfer it but Godot has polygon editing so less need there)

[–] insomniac_lemon@lemmy.cafe 1 points 3 weeks ago

Hey, I'm not sure if it fixes what you were worried about, but there was a new release that fixed more than a few issues.

Furthermore the creator of a 3.X gdnative project (Enu) is involved so that may be interesting longer-term.

[–] BillyCrystalMeth@slrpnk.net 1 points 1 month ago

Never tried Nim, but I saw this on lobste.rs and thought of you: https://miguel-martin.com/blog/nim2-review

[–] ZILtoid1991@lemmy.world -1 points 1 month ago (2 children)
[–] stinky@redlemmy.com 3 points 1 month ago (2 children)

what are you indicating here

[–] bitcrafter@programming.dev 2 points 1 month ago

They are making a funny facial expression while wearing Nim on top of a tall hat.

[–] ZILtoid1991@lemmy.world 1 points 1 month ago (1 children)
[–] stinky@redlemmy.com 1 points 1 month ago

I meat the redundant greater than signs

[–] Kissaki@programming.dev 1 points 1 month ago (1 children)

Are you attempting to indicate D much better than Nim or from D to Nim?