Rust Traverse

traverse.rs

fn into_result(input: &i32) -> Result<&i32, String> {
	Ok(input)
}

fn main() {
    let numbers: Vec<i32> = vec![1, 2, 3, 4, 5];
    let mapper = numbers.iter().map(|x| into_result(x));
    let vector_of_results = mapper.collect::<Vec<Result<&i32, String>>>();
    println!("{:?}", vector_of_results);
    // [Ok(1), Ok(2), Ok(3), Ok(4), Ok(5)]

    let mapper = numbers.iter().map(|x| into_result(x));
    let traversed = mapper.collect::<Result<Vec<&i32>, String>>();
    println!("{:?}", traversed);
    // Ok([1, 2, 3, 4, 5])
}