title: Inject double ampersand operator
body: <p>I have an inject call</p>
  
  <pre><code>[2,4,6].inject(true) { |res, val| res &amp;&amp; val % 2 == 0 }
  </code></pre>
  
  <p>and want to send the <code>&amp;&amp;</code> operator to inject as in <code>inject(0, :+)</code>. How can I do that?</p>