title: Collect values from an array of hashes
body: <p>I have a data structure in the following format:</p>
  
  <pre><code>data_hash = [
      { price: 1, count: 3 },
      { price: 2, count: 3 },
      { price: 3, count: 3 }
    ]
  </code></pre>
  
  <p>Is there an efficient way to get the values of <code>:price</code> as an array like <code>[1,2,3]</code>?</p>