title: TypeScript Set<> collection getting value via index
body: <p>Hello everyone I'm new in TypeScript and maybe i don't see something obvious but here is my question:</p>
  
  <pre><code>const someSet = new Set();
  someSet.add(1)
  console.log(someSet[0])
  </code></pre>
  
  <p>gives me undefined can someone explain me why we cant get value via index? And how can i do that? </p>