title: How to convert array of words into sentence?
body: <p>Given a long, long, long array (length of a 300 pages book), conceptually such as :</p>
  
  <pre><code>["我","是","拖拉机","学院","手","扶","拖拉机","专
  业","的","。","不用","多久","，","我","就","会升",
  "职加薪","，","当上","CEO","，","走上","人生",
  "巅峰","。"]
  </code></pre>
  
  <p><strong>How to efficiently convert this array into a space-separated string ?</strong> Such as:</p>
  
  <p>var str = "我 是 拖拉机 学院 手 扶 拖拉机 专业 的 。 不用 多久 ， 我 就 会升 职加薪 ， 当上 CEO ， 走上 人生 巅峰 。"</p>
  
  <hr>
  
  <p><strong>Edit:</strong></p>
  
  <p>I currently have 2 demo approaches of unknown efficiency :</p>
  
  <pre><code>// For loop
  for (var i = 0; i &lt; input.length; i++) { res = res +' '+input[i]; }; break;
  //or
  // JSON.stringify() + replace()
  JSON.stringify(input).replace(/","|\["|"\]/g, ' ');
  </code></pre>