map witch ebel ⛧ 🧙‍♀️🗺️🌍 @ebel@moytura.org

... must resist urge to rewrite more things in #rust

2 new #Rust libraries for yous. Read & write GeoJSON Sequences & JSON Sequences.
(rfc8142 & rfc7464)
https://crates.io/crates/geojsonseq
https://crates.io/crates/jsonseq

Oh Heaptrack is a nice programme to measure & analyze heap memory access of a programme. Works nicely & easily with #Rust code.
I'm finding it quite easily to reduce memory allocations in my code.
https://kde.org/applications/en/development/org.kde.heaptrack
https://speice.io/2018/10/case-study-optimization.html

Sometime I should give #Rocket a try to build a web app in #Rust. I used to do a lot of #Django. But I'm doing my coding in Rust now.

oooh… #Rust's `std::iter::from_fn(move || { … })` is pretty useful. 🙂

Now to debug my #cgi programme...

Stack Overflow?! In my #Rust?

$ ( ls Cargo.toml ; find ./src/ -type f -name '*.rs' ) | entr -r cargo test

this is what I use to automatically run #rust tests when a file is saved
@rust

RT: @gf_256@twitter.com:
The year is 20XX. Web apps are built in C++ and #Rust with WebAssembly, and desktop apps are built in #JavaScript with Electron.

https://twitter.com/gf_256/status/1264251768558493696

Grrr! I'm not supposed to get segfaults when writing #Rust programmes! This makes things hard

ah #rust lifetime checker we meet again

Whenever I have to use #NodeJS software, I see the benefits of #Rust's staticly checked typed.

I'm writing this software in #Rust with reqwest. I wonder is there a caching wrapper for that?

I'm going to have to learn how #rust's futures & async works at some point.

"I know I'll just write a quick #Rust programme to proxy my http connections and add the header that I want".

Oh cripes, I forgot hyper's now gone weird with Futures and the like.

I have also learned about `impl Into<Cow<_>>` to accept a `&T` and `T`. Which, in retrospect, should have been obvious to me, but I just didn't put 2 and 2 together.
It should make my #rust code more cleaner/ergonomic!

"Elegant Library APIs in #Rust"
Now this is an interesting guide!
(I learned about the `impl Into<Option<T>>` which looks very useful!)
https://deterministic.space/elegant-apis-in-rust.html

Ung. I love #Rust in many ways, but the String/&str thing often wrecks my head. Why is there &str *and* &String? Making functions they can take either type is annoying. (currently trying to wrap my head around Borrow vs AsRef).

OMG, I just discovered if you put this in your Cargo.toml (in a #Rust proj) then dev mode will run as fast a release mode!

[profile.dev]
opt-level = 3

I was using the #rr debugger with #Rust yesterday and it was pretty cool. 🙂

Must resist siren song of writing my own library for #JSONSchema validation. Though there is only one #rust library for #JSON schema validation..... Why not 2?