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<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.4.0/Rx.js"></script>
 
Rx.Observable.of({ name: 'soarflat' }, { name: 'soarflat' }, { name: 'dom' }, { name: 'tom' })
  .distinctUntilChanged((prev, current) => prev.name === current.name)
  .subscribe(
    x => console.log(`next: ${x.name}`),
    error => console.error(`error: ${error}`),
    () => console.log('complete')
  );
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