I woud like to sort a vector. The only way I see would be to use the sort_by for slices. I thought I would have had to convert to slice, sort, and convert back to vector, but no. I have the following, but I am not completely sure I understand it.
let mut v = DVector::<f64>::new_random(4); v.as_mut_slice().sort_by(|a, b| a.partial_cmp(b).unwrap_or(Equal));
I sort of expected that
pub fn as_mut_slice(&mut self) -> &mut [N] would make a copy of my vector and five me a reference to that copy, but it’s is actually directly referring to the representation of the vector. Should I have known better by just reading the signature? That
&mut [N] is a hint, but was my first idea technically possible? Does that
& in the return type always indicate reference to the input value, or can it also be reference to some new value that is made within the function? (I say technically, 'cause now that I’ve reflected on it a bit, I guess it’s the very point of slices to give reference to what’s in the structure…)