exercise-answers.md

CSE 143

Exercise Answers

Week 1

1. Two possible answers are shown below.

   public void stutter() {
   	for (int i = size - 1; i >= 0; i--) {
   		elementData[2 * i + 1] = elementData[i];
   		elementData[2 * i] = elementData[i];
   	}
   	size *= 2;
   }

   public void stutter() {
   	int index = size - 1;
   	for (int i = size * 2 - 1; i > 0; i-=2) {
   		elementData[i] = elementData[index];
   		elementData[i - 1] = elementData[index];
   		index--;
   	}
   	size *= 2;
   }

2. One possible answer is shown below.

public void mirror() { for (int i = size; i < size * 2; i++) { elementData[i] = elementData[size * 2 - 1 - i]; } size *= 2; } ```