title: check if all values returned in filter are equal (google sheets)
body: <p>I have a row with the following values in each cell from A1 until F1</p>
  <pre><code>A,A,A,A,A,A
  </code></pre>
  <p>Then in row 2 I have</p>
  <pre><code>A,B,A,A,A,A
  </code></pre>
  <p>Since some columns are empty (no value) I filter the row to get only cells with value:</p>
  <pre><code>=filter(A1:F1, A1:F1&lt;&gt;&quot;&quot;)
  </code></pre>
  <p>then how can i get a true/false response if all values/strings in the filter array are equal?</p>