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🦀 #Rust Tip #117: fn foo(&self) fn bar (&mut self) fn baz (self) fn boo (mut self) Confused about which one to use in your struct implementations? Here's a useful overview:

Rust's async is beautiful chaos 😮‍💨 Most languages hide concurrency complexity. Rust makes you face it and that's why it's faster. Looks simple - async fn fetch_data() { let result = api_call().await; } But under the hood? Rust compiles this into a state machine.

🦀 #Rust Tip #116: Most of us should know Mutex<> for locking access to specific resources. However, this does also require locking the resources for read. If you need concurrent access to read, take a look at RwLock<> https://t.co/luPgDHcRSk

Note: the reason to_uppercase() returns an iterator is that some characters capitalize to two chars. E.g., "ffi" (Unicode) to "FFI"

🦀 #Rust Tip #115: Here's an interesting self-referential use of iterators, from Rustlings ( https://t.co/qP5zEIFTd0, highly recommended for Rust learners). We get an iterator that capitalizes the char, then use the chain() operator to attach the rest of the string chars.

"Cargo is the most admired cloud development and infrastructure tool" in 2025, says a Stack Overflow study. https://t.co/o6WBpkaEoO

🦀 #Rust Tip #114: A serde tip: #[serde(flatten)] can be used to beautify Json output when serializing. This is useful to improve the handling of enums in particular:

An amazing overview of the core Rust types and traits: https://t.co/Ak9SANexqK

🦀 #Rust Tip #113: https://t.co/BunGWrJlNN is secretly a decent C build system. You can compile wrappers + link C SDKs for Rust wrappers and calling into C code. BTW those println!s are "hidden" build instructions to Cargo. Who needs Makefiles? 🦀

🦀 #Rust Tip #112: Rust will happily compile and call C functions in unsafe mode. Just declare them in an extern "C" block. Great for interop with legacy code or standard library C functions.

🦀 #Rust Tip #111: You can use the examples/ directory in your crate and cargo run --example <name> to run quick experimentations, demos or tests without affecting your https://t.co/OlqnBdRobN file.

🦀 #Rust Tip #110: Rust 2024 edition allows if let Some() chaining. Finally!

Sorry this was actually #Rust Tip #109, my bad.

🦀 #Rust Tip #108: A (new to me) function of Cargo is "cargo check". Use this to turbocharge your edit-compile cycles as cargo check runs type checking only but skips codegen and linking. Great for sorting out those borrow-checker issues 🧠

If they had just used #Rust ... No null pointers!

🦀 #Rust Tip #108: I always enjoy the power of Rust #iterators. Here are two utility functions that you might not know about: .peekable() : Allow peeking at next element without consuming it .partition(cond_fn): Partition an iterator into separate collections with a condition

🦀 #Rust Tip #107: TIL about the #[cold] attribute for functions that don't get called very often. This helps the compiler prioritize hot path functions for better instruction cache performance. #[cold] can also be used to tag enum variants to optimize memory layout.

when you write a rust app, no tests, and it works first try

🦀 #Rust Tip #106: Boxing large enum values can be beneficial to save stack space and to prevent recursion-bombs 💣, by moving these payloads to the heap.