1 import { Subscriber } from '../Subscriber';
2 export function pairwise() {
3 return (source) => source.lift(new PairwiseOperator());
5 class PairwiseOperator {
6 call(subscriber, source) {
7 return source.subscribe(new PairwiseSubscriber(subscriber));
10 class PairwiseSubscriber extends Subscriber {
11 constructor(destination) {
18 pair = [this.prev, value];
25 this.destination.next(pair);
29 //# sourceMappingURL=pairwise.js.map