title: javascript join array to another
body: <p>I want to write a function to join an array to another but different way :</p>
  
  <pre><code>var myNumbers = [10,20,3,4,2]
  var myOperations = ['+','-','*','/']
  </code></pre>
  
  <p>I want the operators locate between myNumbers element :
  10+20-3*4/2 = 54</p>
  
  <p>thank you </p>