title: Why javascript pushed array and defined array not equal
body: <p>I did the following. Very confused whether they are not equal.</p>
  
  <pre><code>var arr1 = []
  arr1.push(1)
  arr1.push(2)
  arr1.push(3)
  
  var arr2 = [1, 2, 3]
  
  var isSame = (arr1==arr2)
  </code></pre>
  
  <p>Why is <code>isSame</code> false? Very confused about this... </p>