rustExample of join_all in Rust

The join_all method in Rust is used to wait for multiple threads to finish executing before continuing with the main thread. It takes a vector of JoinHandles as an argument and returns a Result<Vec<T>, E> where T is the type of the return value of the threads and E is the type of the error.

Code example:

use std::thread;

fn main() {
    let handles: Vec<_> = (0..10).map(|_| {
        thread::spawn(|| {
            // thread code
        })
    }).collect();

    let results = thread::join_all(handles).unwrap();
    // do something with the results
}

Output

No output.

Explanation of code parts:

1. use std::thread;: This imports the thread module from the standard library, which provides functions for creating and managing threads.

2. let handles: Vec<_> = (0..10).map(|_| {: This creates a vector of JoinHandles, which are used to manage the threads. The map function is used to create 10 threads, each of which will execute the code in the closure.

3. thread::spawn(|| {: This creates a new thread and passes the closure to it. The closure contains the code that will be executed by the thread.

4. let results = thread::join_all(handles).unwrap();: This waits for all of the threads to finish executing and returns a Result<Vec<T>, E> where T is the type of the return value of the threads and E is the type of the error. The unwrap method is used to get the Vec<T> from the Result.

5. // do something with the results: This is where you can do something with the results of the threads.

Helpful links:

1. Rust Documentation - Threads
2. Rust Documentation - JoinHandle

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