rust 线程 spawn

use std::thread;
use std::time::Duration;

fn main() {
    let v = vec![1,2,3];
    //通过在闭包之前添加move关键字，我们强制闭包获得它正在使用的值的所有权
    let handle = thread::spawn(move||{
        for i in v{
            println!("spawn {}",i);
            thread::sleep(Duration::from_millis(100));
        }
    });

    //drop(v);
    for i in 1..5 {
        println!("hi number {} from the main thread!", i);
        thread::sleep(Duration::from_millis(1));
    }
    let s = handle.join().unwrap();
    println!("s:{:?}",s);
}


hi number 1 from the main thread!
spawn 1
hi number 2 from the main thread!
hi number 3 from the main thread!
hi number 4 from the main thread!
spawn 2
spawn 3
s:()