pairwise

RxJS 5 pairwise

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/5.0.1/Rx.min.js"></script>

JavaScript

var interval = Rx.Observable.interval(1000);

//Returns: [0,0], [1,0], [1,1], [2,1], [2,2]
interval.pairwise()
	.take(15)
	.subscribe(console.log);