title: How to conditionally assign attribute value in angular 2?
body: <p>I'm trying to learn the Angular 2. I have a simple material input tag and I wish to set it's value on a conditon.</p>
  
  <pre><code>&lt;md-input value="dataSelected ? {{selectedDataName}} : ''"&gt;&lt;/md-input&gt;
  </code></pre>
  
  <p>I tried to set [value] or dataSelected as {{dataSelected}} or (dataSelected) but it doesn't do the trick.
  Can someone lead me into right direction?</p>