title: Iterate over an array of hashes and add to the value of specific hash values
body: <p>If you have an array of hashes such as:</p>
  
  <pre><code>t = [{'pies' =&gt; 1}, {'burgers' =&gt; 1}, {'chips' =&gt; 1}]
  </code></pre>
  
  <p>what would be an efficient and readable way to add <code>1</code> to the value of a hash that has a particular key such as <code>'pies'</code>?</p>