quiz-answers.md

CSE 143

Quiz Answers

Week 2

1. boolean zen is a word used to describe if code using booleans is written in the most concise way possible. If something evaluates to a boolean value you should return that value instead of using an if/else structure to determine whether to return true or false.

2. No, a boolean zen version is shown below.

   return width > 0 && width < 100 && height > 0 && height < 100;

3. No, a boolean zen version is shown below.

   return list.isEmpty();

4. One possible answer is shown below.

   public boolean equals(Stack<Integer> s1, Stack<Integer>s2) {
   	Stack<Integer> temp = new Stack<Integer>();
   	boolean isEqual = true;
   
   	while (isEqual && !s1.isEmpty() && !s2.isEmpty()) {
   		int element1 = s1.pop();
   		int element2 = s2.pop();
   		isEqual = isEqual && element1 == element2;
   		temp.push(element1);
   		temp.push(element2);
   	}
   
   	isEqual = isEqual && s1.isEmpty() && s2.isEmpty();
   
   	while (!temp.isEmpty()) {
   		s2.push(temp.pop());
   		s1.push(temp.pop());
   	}
   
   	return isEqual;
   }