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def knuthShuffle(items : Array)
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i = items.size-1
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while i > 1
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j = Random.rand(0..i)
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items.swap(i, j)
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i -= 1
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end
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end
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def sorted?(items : Array)
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prev = items[0]
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items.each do |item|
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if item < prev
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return false
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end
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prev = item
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end
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return true
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end
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def bogoSort(items : Array)
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while !sorted?(items)
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knuthShuffle(items)
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end
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end
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