title: Vuejs - How to get all unique values in a array (remove duplicates) using v-for
body: <p>How to show only one button per every <strong>distinct</strong> <code>date</code> ?</p>
  
  <p>can i use two v-for loops ? how to select <strong>distinct</strong> values in my loop?</p>
  
  <pre><code>&lt;div v-for="question in allQuestions" &gt;
    &lt;button v-for="date in question.date"&gt;
      {{date}}
    &lt;/button&gt;
  &lt;/div&gt;
  </code></pre>
  
  <h3>Data model :</h3>
  
  <pre><code>allQuestions : []
  question : {'id' : '123' , 'date' : '25'}
  </code></pre>