via http://glu.ttono.us/articles/2007/03/20/snippet-shuffle-an-array a = (1..10).to_a >> a = (1..10).to_a => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] >> a.sort { rand(3) - 1 } => [6, 8, 1, 4, 5, 9, 7, 2, 3, 10] >> a.sort { rand(3) - 1 } => [4, 10, …