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Ruby Quick Sort
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| def quicksort(ary) | |
| size = ary.count | |
| return ary if size <= 1 | |
| i, j = 0, size - 1 | |
| pivot = ary[(size / 2)] | |
| while i < j | |
| i += 1 while ary[i] < pivot | |
| j -= 1 while ary[j] > pivot | |
| ary[i], ary[j] = ary[j], ary[i] | |
| end | |
| quicksort(ary[0..j-1]) + quicksort(ary[j..size-1]) | |
| end | |
| a = (1..400).to_a.shuffle | |
| p a | |
| p quicksort a |
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