Bitwise operation for all elements of a vector

Question

For a Vec<u32> of undefined size, what is the Rust way of calling a bitwise (and, or, xor, etc.) operator on all of them, and returning with the resulting data?

I understand it is possible with a simple loop, what I'm looking for is the Rust way™.

Answer 1

You can use Iterator::fold. For example with bitwise or, |:

pub fn main() {
    let a = vec![1, 2, 4, 8];

    let sum = a.iter().fold(0, |acc, x| acc | x);

    assert_eq!(sum, 15);
}

(Example taken from https://doc.rust-lang.org/std/iter/trait.Iterator.html#examples-38 and adjusted.)