title: How do I zip two arrays into one array of strings containing the values
body: <p>For instance, if I have two arrays that look like this:</p>
  
  <pre><code>var array1 = ['a','b'];
  var array2 = [1, 1];
  </code></pre>
  
  <p>The output array should be:</p>
  
  <pre><code>var newArray = ['a:1', 'b:1']
  </code></pre>