Daily Rust
@rustoftheday
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Daily tips & tricks for Rust 🦀 programming. Following back all accounts with 🦀 or 🐪 in their profile.
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🦀
#daily
#Rust
64:
#TIL
about NonZero numeric types, where you can guarantee at compile time that values will not be zero. It is also a true zero-cost
#abstraction
since if you define e.g., Option<NonZeroU8>, the "0" value will map to "None". Very nifty! Here's an example:
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126
🦀
#daily
#rust
27: Did you know that Rust supports
#destructuring
of most common data types? Here's an example for structs:
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69
@DorianDevelops
Also weird naming schemes:
- S3 == "Storage/Bucket"
- EC2 == "Compute"
- Route 53 == "DNS"
-LightSail == "Simple Compute"
-Lamba == "Cloud Functions"
etc..
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4
66
🦀
#daily
#Rust
68: Today I found out that it is possible to define
#constants
in
#Traits
, and also redefine the values in specific impls of the trait. Still pondering the pros and cons. How would you leverage this feature? Share your thoughts!
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54
🦀
#daily
#Rust
65: Here's a useful treatise by
@ThePrimeagen
extolling the advantages of
#enums
in Rust:
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4
38
Made my day 😆
"Blazingly 🔥 fast 🚀 memory vulnerabilities, written in 100% safe Rust. 🦀"
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26
@ThePrimeagen
I’m increasingly getting the feeling that Rust is a high level language perceived as being a low level language. Using Rust effectively requires understanding of lots of high level concepts. C requires understanding of the machine itself.
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🦀
#daily
#Rust
85: I explored how
#attribute
#macros
, i.e., #[some_attribute], work.
The process is OK but requires quite a bit of support crates, notably:
- quote: for generating Rust code that expands into the output Rust TokenStream.
- syn: for parsing and reasoning about
0
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22
🦀
#daily
#Rust
51. Struggling with map() on a list of
#optionals
in
#iterators
?
filter_map() elegantly handles this by ignoring None values and only processing Some() values:
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22
Rust
Rust
(luckily)
Language at work: Java
Language I enjoy: Rust
What about you?
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0
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🦀
#daily
#rust
30:
#Iterators
can be extended via the chain() function. Rust also gracefully handles chaining of
#optionals
that may or may not have a value:
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3
20
🦀
#daily
#Rust
54. When working in
#async
Rust, and need to perform two (unrelated) tasks, you can dispatch them in parallel using the join! macro from the futures
#crate
. This can be more
#efficient
than calling .await on them sequentially:
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@fredine
I have observed that devs learning Rust without a knowledge of C/C++ have a hard time wrapping their heads around the concepts of "borrow", "pointer", "heap" and "stack". Having background in those languages is not necessary but useful to accelerate the initial learning curve.
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18
🦀
#daily
#Rust
59: I ran into a few cases where I tried to implement an
#extension
#trait
and the compiler wouldn't let me. It turns out that there are two rules to observe:
1) If the trait is defined in your crate, you can implement extensions for any type, even those in other
0
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@cleancodestudio
I don’t get all the complaints that Rust compiles slowly. Compared to other languages is subjectively quite speedy. E.g, in C++ even small projects with a main file and very few includes can take >20s to compile, larger ones 10s of minutes.
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🦀
#Rust
#Sunday
#crate
9: I'd like to highlight the indicatif crate today. It provides a
#progressbar
library for the command line, similar to
#Python
's TQDM, but on steroids. Check it out! (image from )
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4
12
🦀
#daily
#Rust
40: There are actually two flavors of
#macros
in Rust.
#Declarative
and (the more advanced)
#procedural
macros. Here's an example of a declarative macro_rules! macro that generates a println function:
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🦀
#daily
#Rust
44:
Rust
#web
#server
with static file serving and a default route to index.html in actix_web. Almost as simple as
#JavaScript
?
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🦀
#daily
#rust
32:
#iterators
have some cool convenience functions. One of them is it.all(), which checks a given condition for all elements of the iterator.
This allows us to rewrite ugly
#for
#loop
based code in elegant,
#idiomatic
ways:
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14
Exciting milestone reached! 🎉 We've surpassed 500 followers in our
#daily
#Rust
journey. Huge thanks to the amazing Rustacean community 🦀 for your support and engagement. Stay tuned for more top-notch content!
#RustLang
#CodingCommunity
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🦀
#daily
#Rust
49.
Simple
#parallelization
of a for loop using the Rayon crate by adding an import and using the .par_iter() parallel
#iterator
provided by Rayon.
The code counts elements >0. Expected speedup is ~X where X is the nr. of CPU cores you have:
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Wow, this marks one month of
@rustoftheday
, bringing you bite-sized morsels of
#Rust
-related knowledge,
#daily
. We started this account as we believe that Rust
#developers
need to know a lot of small facts to be effective.
Thank you for all the likes and follows! ❤️🦀
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@apollolabsbin
I really, really don't get this argument. How do people put up with C++? Those compile times are 10x worse.
0
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@Archie_Amari
I'm already sold on
#Rust
. Can you point out any resources to get started in the Rust+
#LLM
world?
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@seanbax
I would really welcome this for C++. It is a nice language. However, after experiencing Rust, getting an unexpected segfault after channeling my inner borrow-checker on a recent C++ project really p***ed me off 🙂
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🦀
#daily
#rust
29: Rust
#range
expressions 2/2:
Range expressions can be applied to for loops, or used to create
#iterators
. Don't forget to call collect() to actually make the iterator execute:
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🦀
#daily
#rust
33:
Is let a: Arc<Mutex<Vec<f32>>> bothering you visually? Enter the type keyword, which lets you define type
#aliases
:
type SharedSafeVec = Arc<Mutex<Vec<T>>>
Then you can write: let a: SharedSafeVec<f32>
#RustLang
#CodeSimplicity
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Threads > Async
24
Async > Threads
29
Depends (add reply)
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🦀
#daily
#rust
26:
#Traits
in Rust work similar to
#interface
definitions in other languages. Structs or enums that implement a trait are contractually bound to provide a
#function
with the signature specified in the trait.
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@Dev_AbdulHaseeb
Neither: I would propose the word "craftsmanship". We're all glorified bit-plumbers when coding.
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🦀🎇
#Rust
#Sunday
#crate
8:
Are your for loops taking too long? Are 9 of your
#CPU
cores idle while you wait for results to manifest?
Check out the Rayon crate to take advantage of
#parallelization
in a simple way:
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@sentinel1909
Since we already have Rust, where do you reckon it fits into the stack? Python replacement?
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🦀
#daily
#rust
16: Hey, you have some fine
#HashMaps
there, how do I
#initialize
them?
Besides creating a new HashMap and inserting keys and values, one notable way is to use an array of tuples and an
#iterator
:
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