codesnips

rust

rust 
fn main() {
    let numbers = vec![1, 2, 3, 4, 5];

    let sum: i32 = numbers
        .iter()
        .filter(|&&x| x % 2 == 0)

Iterator trait and combinators for zero-cost collection processing

rust iterators functional
by Marcus Chen 1 tab
rust 
use std::collections::HashMap;
use std::hash::Hash;

const NIL: usize = usize::MAX;

struct Node<K, V> {

Build an O(1) LRU Cache in Rust With a HashMap and Intrusive Doubly Linked List

rust lru cache
by codesnips 3 tabs
rust 
trait Container {
    type Item;
    fn get(&self, index: usize) -> Option<&Self::Item>;
}

struct Warehouse {

Associated types in traits for cleaner generics

rust traits generics
by Marcus Chen 1 tab
rust 
use std::env;

fn main() {
    let port: u16 = env::var("PORT")
        .unwrap_or_else(|_| "8080".to_string())
        .parse()

Environment variables with std::env for configuration

rust config environment
by Marcus Chen 1 tab
rust 
use std::collections::VecDeque;

pub struct RollingAverage {
    buf: VecDeque<f64>,
    capacity: usize,
    sum: f64,

Rolling Average Over a Sliding Window of Sensor Readings in Rust

rust sliding-window streaming
by codesnips 2 tabs
rust 
#[derive(Debug, Clone)]
pub struct Order {
    pub id: u64,
    pub amount_cents: i64,
    pub currency: [u8; 3],
}

Partition a Slice of Orders into Shards for Parallel Processing with Rayon

rust rayon parallelism
by codesnips 2 tabs
rust 
use std::collections::VecDeque;

fn main() {
    let mut queue = VecDeque::new();
    queue.push_back(1);
    queue.push_back(2);

VecDeque<T> for double-ended queue operations

rust collections
by Marcus Chen 1 tab
rust 
use std::os::raw::c_int;

pub const LOCK_EX: c_int = 2;
pub const LOCK_NB: c_int = 4;
pub const LOCK_UN: c_int = 8;

RAII File Lock Guard in Rust With Drop-Based Release

rust raii drop
by codesnips 3 tabs
rust 
use axum::{routing::get, Router, Json};
use serde::Serialize;

#[derive(Serialize)]
struct Response {
    message: String,

axum for type-safe async HTTP servers

rust async axum
by Marcus Chen 1 tab
rust 
use tokio::time::{sleep, Duration};

#[tokio::main]
async fn main() {
    let fast = sleep(Duration::from_millis(50));
    let slow = sleep(Duration::from_millis(200));

tokio::select! for racing multiple async operations

rust async tokio
by Marcus Chen 1 tab
rust 
use std::sync::Arc;
use std::time::{Duration, Instant};
use tokio::sync::Mutex;
use tokio::time::sleep;

#[derive(Debug)]

Rate-Limiting Outbound HTTP with a Token Bucket in Rust (Tokio)

rust tokio rate-limiting
by codesnips 3 tabs
rust 
use clap::{Args, Parser, Subcommand, ValueEnum};

#[derive(Parser, Debug)]
#[command(name = "tasks", version, about = "A tiny task manager")]
pub struct Cli {
    #[arg(short, long, global = true)]

Building a clap Subcommand Dispatcher With a Command Trait in Rust

rust clap cli
by codesnips 3 tabs