title: how to use underscore.js library in angular 2
body: <p>I trying to create an application with angular 2,and want use underscore.js library in my .ts files ,for example when i want use this function : </p>
  
  <pre><code>   let myId = _.rest([5, 4, 3, 2, 1]);
  </code></pre>
  
  <p><code>_</code> is not define and throw error and i dont want use   <code>declare var _ : any;</code> in my module</p>