title: any code runner online like jsfiddle with expected result?
body: <p>is any apps or service like jdoodle/jsbin/whatever that can do things like we expecting a result from our code.</p>
  <p>for example, i've program like below:</p>
  <pre class="lang-js prettyprint-override"><code>//todo
  console.log(&quot;hello programmer! Change this text please&quot;)
  //result should be return to &quot;hello world&quot;
  
  </code></pre>
  <p>then i've rule as expected result</p>
  <pre><code>hello world
  </code></pre>
  <p>like what we can do inside hackerrank and others.</p>
  <p>and of course, we can include the code and result check to another website.</p>