//timerOne emits first value at 1s, then once every 4s

const timerOne = Rx.Observable.timer(1000, 4000);

//timerTwo emits first value at 2s, then once every 4s

const timerTwo = Rx.Observable.timer(2000, 4000)

//timerThree emits first value at 3s, then once every 4s

const timerThree = Rx.Observable.timer(3000, 4000)

​

//combineLatest also takes an optional projection function

const combinedProject = Rx.Observable

.combineLatest(

    timerOne,

    timerTwo,

    timerThree,

    (one, two, three) => {

      return `Timer One (Proj) Latest: ${one}, 

              Timer Two (Proj) Latest: ${two}, 

              Timer Three (Proj) Latest: ${three}`

    }

);

//log values

const subscribe = combinedProject.subscribe(latestValuesProject => console.log(latestValuesProject));