Angular 2 Beta released(angularjs.blogspot.com)

    @Pipe({
      name: 'tempConvert'
    })
    // The work of the pipe is handled in the tranform method with our pipe's class
    class TempConvertPipe implements PipeTransform {
      transform(value: number, args: any[]) {
        if(value && !isNaN(value) && args[0] === 'celsius') {
          var temp = (value - 32) * 5/9;
          var places = args[1];
          return temp.toFixed(places) + ' C';       
        }
    
        return;
      }
    }