title: Push datas into a multidimensional array in JS
body: <p>I'm trying to push some datas into my array.</p>
  
  <p>Actually my code looks like this:</p>
  
  <pre><code>arr.push('step1||item1||99');
  </code></pre>
  
  <p>It works but it's not the best as I need to split it after to manager datas.</p>
  
  <p>How can I transform this into a multidimensional array ?</p>
  
  <p>What I tried:</p>
  
  <pre><code>arr = [];
  arr['step'] = 'step1';
  arr['name'] = 'item1';
  arr['number'] = '99';
  arr.push(arr);
  </code></pre>
  
  <p>But it doesn't work...</p>
  
  <p>Any help please.</p>