title: Length of empty array (JavaScript Koans)
body: <p>Working on JavaScript Koans. Below I've included the prompt and then my answer. </p>
  
  <p>I got the first part right, but when I put <strong>0</strong> as the expected length of an empty array, it says the answer is incorrect and reads, <em>"Expected 0 to be 'Fill this value in'."</em></p>
  
  <p>I've tried <strong>0</strong>, <strong>'0'</strong>, <strong>""</strong>, <strong>null</strong> and undefined <em>(I'm new to programming, I'm sure a few of those don't make sense, but they came to mind.)</em></p>
  
  <p>Prompt:</p>
  
  <pre><code>it("should create arrays", function() {
     var emptyArray = [];
     expect(typeof(emptyArray)).toBe(FILL_ME_IN);
     expect(emptyArray.length).toBe(FILL_ME_IN);
  </code></pre>
  
  <p>My answer:</p>
  
  <pre><code>it("should create arrays", function() {
     var emptyArray = [];
     expect(typeof(emptyArray)).toBe('object');
     expect(emptyArray.length).toBe(0);
  </code></pre>