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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>bufferCount</title>
  <script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-beta.3/dist/global/Rx.umd.js"></script>
</head>
<body>
</body>
</html>
 
//emit immediately then every 1s
const source = Rx.Observable.timer(0, 1000);
const example = source
  .window(Rx.Observable.interval(3000))
const count = example.scan((acc, curr) => acc + 1, 0)          
/*
  "Window 1:"
  0
  1
  2
  "Window 2:"
  3
  4
  5
  ...
*/
const subscribe = count.subscribe(val => console.log(`Window ${val}:`));
const subscribeTwo = example.mergeAll().subscribe(val => console.log(val));
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