title: Access to array inside array
body: <pre><code>var array = [
          [&quot;a&quot;, &quot;b&quot;, &quot;c&quot;],
          [&quot;q&quot;, &quot;w&quot;, &quot;e&quot;],
          [&quot;p&quot;, &quot;h&quot;, &quot;j&quot;],
          [&quot;z&quot;, &quot;r&quot;, &quot;m&quot;]
  ]
  </code></pre>
  <p>How can I access 4. line 1. letter &quot;z&quot; ?</p>