title: How can I use ngFor to iterate over Typescript Enum as an array of strings
body: <p>I'm using Angular2 and TypeScript and I have an enum:</p>
  <pre class="lang-js prettyprint-override"><code>export enum Role {
      ServiceAdmin, CompanyAdmin, Foreman, AgentForeman, 
      CrewMember, AgentCrewMember, Customer
  }
  </code></pre>
  <p>I want to use *ngFor to iterate over the enum. What is the best way to do this? Must I create a Pipe? Or is there a simpler way?</p>