title: JavaScript: How to join / combine two arrays to concatenate into one array?
body: <p>I'm trying to combine 2 arrays in javascript into one.</p>
  
  <pre><code>var lines = new Array("a","b","c");
  lines = new Array("d","e","f");
  </code></pre>
  
  <p>This is a quick example, i want to be able to combine them so that when the second line is read the 4th element in the array would return "d"</p>
  
  <p>How would i do this?</p>