To retrieve the spawned thread, Rust uses the join() trait and then unwraps the result.
Figure 5
To make our small example application output, we therefore need to join the spawned thread back to the main thread:
use std::thread;
fn main()
{
let threadhandle = thread::spawn(||
{
"Hello from a thread in your Rust program"
});
println!("{}", threadhandle.join().unwrap());
}
Code for the alterations can be found in Chapter11/joined_thread.
When we run the code, this time we see the following:
Figure 6
Hold on. That code isn't the same! This is true, and it is due to the spawn accepting a closure (||).