20 lines
409 B
Ruby
20 lines
409 B
Ruby
#Fitcher-Yates shuffling algorithm
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#(start from last element,swap with random element from the array,decrement array size by one and repeat until array size is 1)
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#Time-complexity: O(n)
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def shuffle(arr)
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n=arr.length
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for i in (n-1).downto(1)
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j=Random.rand(i+1)
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swap(arr,i,j)
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end
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print arr
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end
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def swap(arr,i,j)
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temp = arr[i]
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arr[i] = arr[j]
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arr[j] = temp
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end
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shuffle([1,2,3,4,5,6]) |