title: Getting a property by using another property as key
body: <p>Is it possible to get a property of an object having the key being another property?</p>
  
  <p>Handlebars data:</p>
  
  <pre><code>{
     person: {
        firstName: 'John',
        lastName: 'Doe'
     },
     propertyToGetFromPerson: 'firstName'
  }
  </code></pre>
  
  <p>Then in the template itself I would like to get <code>firstName</code> of person but by using the <code>propertyToGetFromPerson</code> property in stead of the literal 'firstName'.</p>
  
  <p>In JavaScript this would be: <code>person[propertyToGetFromPerson]</code></p>
  
  <p>So I am searching for the <strong>equivalent in handlebars</strong> if there is one.</p>
  
  <p>I am looking for an <strong>answer without using helpers</strong>, if there is no answer I can write a helper.</p>