From 4dfc11d74ab02ac5765ae5d08fb750c91f4744b4 Mon Sep 17 00:00:00 2001 From: Hunter Kvalevog Date: Fri, 2 Oct 2026 21:53:51 -0500 Subject: rustlings: move to rust/ --- rust/rustlings/exercises/20_threads/threads1.rs | 37 +++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 rust/rustlings/exercises/20_threads/threads1.rs (limited to 'rust/rustlings/exercises/20_threads/threads1.rs') diff --git a/rust/rustlings/exercises/20_threads/threads1.rs b/rust/rustlings/exercises/20_threads/threads1.rs new file mode 100644 index 0000000..dbc64b1 --- /dev/null +++ b/rust/rustlings/exercises/20_threads/threads1.rs @@ -0,0 +1,37 @@ +// This program spawns multiple threads that each runs for at least 250ms, and +// each thread returns how much time it took to complete. The program should +// wait until all the spawned threads have finished and should collect their +// return values into a vector. + +use std::{ + thread, + time::{Duration, Instant}, +}; + +fn main() { + let mut handles = Vec::new(); + for i in 0..10 { + let handle = thread::spawn(move || { + let start = Instant::now(); + thread::sleep(Duration::from_millis(250)); + println!("Thread {i} done"); + start.elapsed().as_millis() + }); + handles.push(handle); + } + + let mut results = Vec::new(); + for handle in handles { + // TODO: Collect the results of all threads into the `results` vector. + // Use the `JoinHandle` struct which is returned by `thread::spawn`. + } + + if results.len() != 10 { + panic!("Oh no! Some thread isn't done yet!"); + } + + println!(); + for (i, result) in results.into_iter().enumerate() { + println!("Thread {i} took {result}ms"); + } +} -- cgit v1.2.3