choose float sort

[gjaegle]

in my particular project, i need both increasing sort and decreasing sort.

could you please detail how i could specialize the order to reverse the default increasing sort?

or should i clone your library to duplicate the methods & structure of OrderedFloat.

[optozorax]

@gjaegle

let arr = vec![1.0, 2.0, 3.0].into_iter().map(|x| NotNan::new(x).unwrap());
arr.sort_by_key(|x| std::cmp::Reverse(x));