Function decode_mut 

pub fn decode_mut<T: Ord>(xs: &mut [T], p: usize)

Applies the permutation of the value p to the slice xs.

The applied permutation can be encoded with encode to get back p.

decode_mut(&mut xs, p);
assert_eq!(encode(&xs), p);

See decode for a version that allocates a vector for the permutation.

Panics

Panics in debug mode if xs is not increasing or p is out of range.