title: Difference between underscore js _.each method and _.invoke method
body: <p>I am not able to understand the difference between <a href="http://underscorejs.org/" rel="nofollow">underscore js</a> methods <a href="http://underscorejs.org/#each" rel="nofollow"><code>_.each</code></a> and <a href="http://underscorejs.org/#invoke" rel="nofollow"><code>_.invoke</code></a>.<br>
  Both seems to invoke the function passed on each item.   </p>
  
  <p>Under which scenario shall I use <code>_.each</code> and <code>_.invoke</code>?   </p>
  
  <p>Please share the difference with some examples.  </p>