sergzak022

function zipStrings(str1, str2) {

  if (str1[0] == null && str2[0] == null) {
    return '';
  }

  let ch1 = str1[0];
  let ch2 = str2[0];

  let tail = zip(

sergzak022

var exhausted$ = source$.exhaustMap((number) => {
  return multBy2Delayed(number);
});

// Code above will work exactly the same as code bellow

var exhausted$ = source$.map((number) => {
  return multBy2Delayed(number);
}).exhaust();

sergzak022

var switched$ = source$.map((number) => {
  return multBy2Delayed(number);
}).switch();

// Code above will work exactly the same as code bellow

var switched$ = source$.switchMap((number) => {
  return multBy2Delayed(number);
});

sergzak022

var source$ = Observable.timer(0, 200).take(6);

function multBy2Delayed(number) {
  // I take 1000ms to multiply your number by two
  return Observable.timer(1000).map(() => number * 2);
}

// NEW CODE STARTS HERE

var exhausted$ = source$.exhaustMap((number) => {

sergzak022

var source$ = Observable.timer(0, 200).take(6);

function multBy2Delayed(number) {
  // I take 1000ms to multiply your number by two
  return Observable.timer(1000).map(() => number * 2);
}

// NEW CODE STARTS HERE

var switched$ = source$.switchMap((number) => {

sergzak022

function multBy2Delayed(number) {
  // I take 1000ms to multiply your number by two
  return Observable.timer(1000).map(() => number * 2);
}

sergzak022

 // will log 0,1,2,3,4,5 to console
Observable.timer(0, 200).take(6).subscribe((val) => console.log(val));

sergzak022

var source$ = Observable.timer(0, 200).take(6);