title: ES6 equivalent to lodash _.mapValues
body: <p>What are the different ways to convert the lodash _.mapValues to ES6. </p>
  
  <p>Code:</p>
  
  <pre><code>var fruits= {
    'apple':    { 'name': 'apple',    'number': 5},
    'orange': { 'name': 'orange', 'number': 10 }
  };
  
  _.mapValues(fruits, 'number');
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>{ 'apple': 5, 'orange': 10 }
  </code></pre>