title: Using arr.push vs arr.push.apply(arr, element)
body: <p>I mostly use it like this: </p>
  
  <pre><code>arr.push(element)
  </code></pre>
  
  <p>But I have seen people using like this: </p>
  
  <pre><code>arr.push.apply(arr, element)
  </code></pre>
  
  <p>What's the different between this two methods?</p>