"use strict";
//emit value every 1s
var source = Rx.Observable.interval(1000);
//sample last emitted value from source every 2s 
var example = source.sample(Rx.Observable.interval(2000))
    .scan(function (acc, curr) { return curr; });
//output: 2..4..6..8..
var subscribe = example.subscribe(function (val) { return console.log(val); });
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