title: How to convert list<String> into String in Dart without iteration?
body: <p>Is there a method in Dart like the <code>String.join()</code> method in Java &amp; c#?</p>
  <p><strong>input:</strong></p>
  <pre><code>nums: [&quot;20&quot;,  &quot;3005&quot;,  &quot;2&quot;]
  </code></pre>
  <p><strong>output:</strong></p>
  <pre><code>nums = &quot;2030052&quot;
  </code></pre>