title: What's the meaning of _*
body: <pre><code>val numbers = scala.collection.parallel.mutable.ParTrieMap(
      (1 until 100) zip (1 until 100): _*
    ) map { case (k, v) =&gt; (k.toDouble, v.toDouble) }
  </code></pre>
  
  <p>For the above code I know that <code>(1 until 100) zip (1 until 100)</code> will return something like a Map, but what's the meaning of <code>_*</code> following it?</p>