title: Push one array to the end of another
body: <p>I am new to GAS. I have two arrays. AR1 has 7 cols and 16 rows. AR2 has 7 cols and 4 rows. I want to push the small array (AR2) to the bottom of the big array (AR1) for AR1 to have 7 cols and 20 rows. This is my code:</p>
  <pre><code>AR1.push(AR2);
  </code></pre>
  <p>When I check if there is new data by setting the values of AR1 into the active sheet (sh):</p>
  <pre><code>sh.getRange(1,1,AR1.length,AR1[0].length).setValues(AR1)
  </code></pre>
  <p>I get an error:
  Exception: The number of columns in the data does not match the number of columns in the range. The data has 4 but the range has 7.
  And AR1 is written in the unchanged form in the active sheet with 7 cols and 16 rows.</p>
  <p>It looks like AR2 is transposed in push command and/or not pushed to the end of AR1, but I don't understand why or how to fix it. Any help is highly appreciated.</p>