Yep. I did say that that solution exists ^^. I just said that you couldn't do it without creating something to hold the merged result. Your solution does all

Yep. I did say that that solution exists ^^. I just said that you couldn't do it without creating something to hold the merged result. Your solution does allocate a buffer to hold the merged result: `self.array = self.a + self.b` I wasn't saying you can't sort arrays in place (quicksort). I was saying you can't merge them in place. Somebody has to grow.