um.rs

fn main() {
    let mut pixels = [0f32, ..8];

    for &mut pixel in pixels.mut_iter() {
        pixel = 2.0;
    }

    println!("{:?}", pixels);  // [0f32, 0f32, 0f32, 0f32, 0f32, 0f32, 0f32, 0f32]
}