I was using rand::sample to shuffle an arbitrary number of elements from a list, until I noticed that the ordering was stable, and so no shuffling was happening, only random selection.

Is there reason to add such functionality to the crate? Or is the expected way of doing this shuffling, then slicing? Or sampling, then shuffling?

rand: 0.3.16
rustc: 1.21.0-nightly
cargo: 0.22.0-nightly