title: How to remove the last \t (tab) in array map
body: <p>I push my data inside an array and after that i use this code to have some join on that array.</p>
  
  <pre><code>var tsv = ArrExport.map(function(field) {
     return field.join("\t");
   }).join('\r\n');
  </code></pre>
  
  <p>The ouput of that is this</p>
  
  <pre><code>Data1 [Tab] Data2 [Tab] Data3 [Tab]
  Data1 [Tab] Data2 [Tab] Data3 [Tab]
  </code></pre>
  
  <p>How can I remove the last <code>[tab]</code>?</p>
  
  <p>Example</p>
  
  <p><code>Data1 [Tab] Data2 [Tab] Data3
   Data1 [Tab] Data2 [Tab] Data3
  </code></p>