title: Scala Check optional string is null or empty
body: <p>I am a newbie to Scala and I want to learn how can I add null and empty check on an <strong>optional</strong> string? </p>
  
  <pre><code>val myString : Option[String]
  
  if (null != myString) {
    myString
      .filter(localStr=&gt; StringUtils.isEmpty(localStr))
      .foreach(localStr=&gt; builder.queryParam("localStr", localStr))
  }
  </code></pre>
  
  <p>Above code works but I want to learn some elegant way of writing same check. Any help is highly appreciated, </p>
  
  <p>thanks</p>