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244 B

pub fn copy_slice<T,D,S>(mut dst: D, src: S) -> usize
where T: Clone,
D: AsMut<[T]>,
S: AsRef<[T]>
{
let mut i =0;
for (d,s) in dst.as_mut().iter_mut().zip(src.as_ref().iter())
{
*d = s.clone();
i+=1;
}
i
}