title: How do you clone an array of objects using underscore?
body: <pre><code>#!/usr/bin/env node
  var _ = require('underscore');
  var a = [{f: 1}, {f:5}, {f:10}];
  var b = _.clone(a);
  b[1].f = 55;
  console.log(JSON.stringify(a));
  </code></pre>
  
  <p>This results in:</p>
  
  <pre><code>[{"f":1},{"f":55},{"f":10}]
  </code></pre>
  
  <p>Clone does not appear to be working!
  So I RTFM, and see this:</p>
  
  <p><a href="http://underscorejs.org/#clone">http://underscorejs.org/#clone</a></p>
  
  <blockquote>
    <p>Create a shallow-copied clone of the object. Any nested objects or arrays will be copied by reference, not duplicated.</p>
  </blockquote>
  
  <p>So <code>_.clone</code> is pretty useless.  Is there a way to actually copy the array of objects?</p>