ruby - How to shuffle an array the same way every time? -


calling array#shuffle shuffles array randomly, want shuffle reproducibly – i.e., same way every time. there method that? want call, example, shuffle_with_key(123) , same result every time.

array#shuffle can take seeded random instance.

a = [1,2,3,4] seed = 1  a.shuffle(random: random.new(seed)) # => [4, 1, 3, 2]  a.shuffle(random: random.new(seed)) # => [4, 1, 3, 2]

just replace seed = 1 whatever random seed want use.


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