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@Directive({
  selector: '[range]'
})
export class RangeDirective {
  _range: number[];

  @Input()
  set range( value ) {
    this.vcr.clear();
    this._range = this.generateRange(value[0], value[1]);

    this._range.forEach(num => {
      this.vcr.createEmbeddedView(this.tpl, {
        $implicit: num
      });
    });
  }

  constructor( private vcr : ViewContainerRef, private tpl : TemplateRef<any> ) {}

  private generateRange( from, to ) {
     // create range
  }

}