Function copy_into 

pub fn copy_into<T, Op>(
    dest: &mut StridedViewMut<'_, T>,
    src: &StridedView<'_, T, Op>,
) -> Result<(), StridedError>
where
    T: Copy + MaybeSendSync,
    Op: ElementOp<T>,

Copy elements from source to destination: dest[i] = src[i].