> **Source:** [https://brettterpstra.com/6b5feb74-4208-11e9-9d31-040140774501](https://brettterpstra.com/6b5feb74-4208-11e9-9d31-040140774501) > **Snapshot:** 2026-04-26T16:12:46Z > **Generator:** Remarkbox `b35c136` > > *This is a subthread snapshot. The living document lives at the source URI above — it may have been edited, extended, or replied-to since.*



These were even faster for a large number of elements: `(0..99999).to_a.shuffle[0..4]`, `(0..99999).sort_by{rand}[0..4]`. (Than this: `(0..99999).to_a.sort{rand() -0.5 }[0..4]`.) --- **Source:** [https://brettterpstra.com/6b5feb74-4208-11e9-9d31-040140774501](https://brettterpstra.com/6b5feb74-4208-11e9-9d31-040140774501) **Snapshot:** 2026-04-26T16:12:46Z **Generator:** Remarkbox `b35c136`