title: Angular 2 Pipe under condition
body: <p>Is it possible in Angular 2 to apply a pipe under condition?
  I would like to do something like: </p>
  
  <pre><code>{{ variable.text | (variable.value ? SomePipe : OtherPipe) }}
  </code></pre>
  
  <p>If not, what is the preferred way to achieve this effect?</p>