rust-play

This is only a test

rust-play

struct t{
    a: u32,
    b: u32
}

fn main() {
    let mut test: t;
    test.a = 16;
    test.b = 12;
    let res: u32 = test.a*test.b;

rust-play

struct Test {
    a: u32,
    b: u32,
}

impl Test {
    fn new(a: u32, b: u32) -> Test {
        Test { a, b }
    }
}

rust-play

#![feature(specialization)]

pub struct MemberBase {
    id: u32,
}
impl MemberBase {
    pub fn id(&self) -> u32 { self.id }
}
pub trait UiMemberSpecialization {
    fn size(&self) -> (u32, u32);

rust-play

struct Testing{
    one: Option<String>
}

impl Testing {
    /// redis://[:<passwd>@]<hostname>[:port][/<db>]
    pub fn do_something(&self) {
        let one = &self.one.unwrap_or_default();
        println!("one is: {:?}", one);

rust-play

struct Testing{
    one: Option<String>
}

impl Testing {
    /// redis://[:<passwd>@]<hostname>[:port][/<db>]
    pub fn do_something(&self) {
        let one = self.one.as_ref().unwrap();
        println!("one is: {:?}", one);

rust-play

fn main() {

let mut v = vec![1, 2, 3, 4, 5];

let first = &v[0];

v.push(6);
}

rust-play

//play.rust-lang.org
fn main() {}

rust-play

extern crate chrono;
use chrono::prelude::*;

fn main() {
    let datetime = Utc.ymd(2020, 1, 1).and_hms(0, 0, 0);
    let timestamp = datetime.timestamp();
    let naive_datetime = NaiveDateTime::from_timestamp(timestamp, 0);
    let datetime_again: DateTime<Utc> = DateTime::from_utc(naive_datetime, Utc);

    println!("{}", datetime_again);

rust-play

fn greet_world() {
    println!("Hello, world!");  // our old friend.

    let southern_germany = "Grüß Gott!";
    let japan = "ハロー・ワールド";

    let regions = [southern_germany, japan];

    for region in &regions {
            println!("{}", region);