title: How to join two array for csv-like new array by JavaScript
body: <p>I want to join js array for csv like.
  So, how to simply(no use &quot;for&quot; if I can) write code please tell me.
  Only use Chrome.</p>
  <pre><code>let arr1 = [&quot;hoge&quot;,&quot;piyo&quot;, &quot;fuga&quot;];
  let arr2 = [&quot;foo&quot;, &quot;bar&quot;, &quot;baz&quot;];
  //Want to array
  let arrResult = [&quot;hoge,foo&quot;,&quot;piyo,bar&quot;, &quot;fuga,baz&quot;];
  </code></pre>