title: How to rerun a method passed as an input property to an angular component?
body: <p>I need to pass a calculated value to an Angular component. Currently I'm doing it like this:</p>
  
  <pre><code>&lt;component [value]="getCalculatedValue()"&gt;&lt;/component&gt;
  </code></pre>
  
  <p>The problem is that the base for the calculated value changes every minute so the calculated value must also be updated.</p>
  
  <p>How can I tell angular to run the <code>getCalculatedValue</code> method again for every component that it uses?</p>
  
  <p>As the component is an external component I would prefer a way without modifying the component.</p>