title: return a range of values from an array in underscore.js
body: <p>I have an array with the following data </p>
  
  <pre><code>var a = [1,2,3,4,5,6,7]
  </code></pre>
  
  <p>I am looking for a method in underscore.js or backbone.js in which I can return the elements with a specified range. for ex:  </p>
  
  <pre><code>filter(2,5) should return  [3,4,5,6] 
  </code></pre>
  
  <p>which is the 2nd to 5th index elements in the array. Any pointers for me ?</p>