1 def quick_sort(a) 2 3 return a if a.size < 2 4 5 (x = a.pop) ? quick_sort(a.select{|i| i <=x }) + [x] + quick_sort(a.select{|i| i > x}) : [] 6 7 end 8 9 array = [72,6,57,88,60,42,83,73,42,48,85] 10 11 p quick_sort(array) #=> [6, 42, 42, 48, 57, 60, 72, 73, 83, 85, 88]
原文：http://www.cnblogs.com/leaf526/p/3718287.html