# Operators

A complete list of RxJS operators with clear explanations, relevant resources, and executable examples.

[*Prefer a complete list in alphabetical order?*](/learn-rxjs/operators/complete.md)

### Contents (By Operator Type)

* [Combination](/learn-rxjs/operators/combination.md)
  * [combineLatestAll](/learn-rxjs/operators/combination/combineall.md)
  * [combineLatest](/learn-rxjs/operators/combination/combinelatest.md) ⭐
  * [concat](/learn-rxjs/operators/combination/concat.md) ⭐
  * [concatAll](/learn-rxjs/operators/combination/concatall.md)
  * [endWith](/learn-rxjs/operators/combination/endwith.md)
  * [forkJoin](/learn-rxjs/operators/combination/forkjoin.md)
  * [merge](/learn-rxjs/operators/combination/merge.md) ⭐
  * [mergeAll](/learn-rxjs/operators/combination/mergeall.md)
  * [pairwise](/learn-rxjs/operators/combination/pairwise.md)
  * [race](/learn-rxjs/operators/combination/race.md)
  * [startWith](/learn-rxjs/operators/combination/startwith.md) ⭐
  * [withLatestFrom](/learn-rxjs/operators/combination/withlatestfrom.md) ⭐
  * [zip](/learn-rxjs/operators/combination/zip.md)
* [Conditional](/learn-rxjs/operators/conditional.md)
  * [defaultIfEmpty](/learn-rxjs/operators/conditional/defaultifempty.md)
  * [every](/learn-rxjs/operators/conditional/every.md)
  * [iif](/learn-rxjs/operators/conditional/iif.md)
  * [sequenceequal](/learn-rxjs/operators/conditional/sequenceequal.md)
* [Creation](/learn-rxjs/operators/creation.md)
  * [ajax](/learn-rxjs/operators/creation/ajax.md) ⭐
  * [create](/learn-rxjs/operators/creation/create.md)
  * [defer](/learn-rxjs/operators/creation/defer.md)
  * [empty](/learn-rxjs/operators/creation/empty.md)
  * [from](/learn-rxjs/operators/creation/from.md) ⭐
  * [fromEvent](/learn-rxjs/operators/creation/fromevent.md)
  * [generate](/learn-rxjs/operators/creation/generate.md)
  * [interval](/learn-rxjs/operators/creation/interval.md)
  * [of](/learn-rxjs/operators/creation/of.md) ⭐
  * [range](/learn-rxjs/operators/creation/range.md)
  * [throwError](/learn-rxjs/operators/creation/throw.md)
  * [timer](/learn-rxjs/operators/creation/timer.md)
* [Error Handling](/learn-rxjs/operators/error_handling.md)
  * [catch / catchError](/learn-rxjs/operators/error_handling/catch.md) ⭐
  * [retry](/learn-rxjs/operators/error_handling/retry.md)
  * [retryWhen](/learn-rxjs/operators/error_handling/retrywhen.md)
* [Filtering](/learn-rxjs/operators/filtering.md)
  * [audit](/learn-rxjs/operators/filtering/audit.md)
  * [auditTime](/learn-rxjs/operators/filtering/audittime.md)
  * [debounce](/learn-rxjs/operators/filtering/debounce.md)
  * [debounceTime](/learn-rxjs/operators/filtering/debouncetime.md) ⭐
  * [distinct](/learn-rxjs/operators/filtering/distinct.md)
  * [distinctUntilChanged](/learn-rxjs/operators/filtering/distinctuntilchanged.md) ⭐
  * [distinctUntilKeyChanged](/learn-rxjs/operators/filtering/distinctuntilkeychanged.md)
  * [filter](/learn-rxjs/operators/filtering/filter.md) ⭐
  * [find](/learn-rxjs/operators/filtering/find.md)
  * [first](/learn-rxjs/operators/filtering/first.md)
  * [ignoreElements](/learn-rxjs/operators/filtering/ignoreelements.md)
  * [last](/learn-rxjs/operators/filtering/last.md)
  * [sample](/learn-rxjs/operators/filtering/sample.md)
  * [single](/learn-rxjs/operators/filtering/single.md)
  * [skip](/learn-rxjs/operators/filtering/skip.md)
  * [skipUntil](/learn-rxjs/operators/filtering/skipuntil.md)
  * [skipWhile](/learn-rxjs/operators/filtering/skipwhile.md)
  * [take](/learn-rxjs/operators/filtering/take.md) ⭐
  * [takeLast](/learn-rxjs/operators/filtering/takelast.md)
  * [takeUntil](/learn-rxjs/operators/filtering/takeuntil.md) ⭐
  * [takeWhile](/learn-rxjs/operators/filtering/takewhile.md)
  * [throttle](/learn-rxjs/operators/filtering/throttle.md)
  * [throttleTime](/learn-rxjs/operators/filtering/throttletime.md)
* [Multicasting](/learn-rxjs/operators/multicasting.md)
  * [multicast](/learn-rxjs/operators/multicasting/multicast.md)
  * [publish](/learn-rxjs/operators/multicasting/publish.md)
  * [share](/learn-rxjs/operators/multicasting/share.md) ⭐
  * [shareReplay](/learn-rxjs/operators/multicasting/sharereplay.md) ⭐
* [Transformation](/learn-rxjs/operators/transformation.md)
  * [buffer](/learn-rxjs/operators/transformation/buffer.md)
  * [bufferCount](/learn-rxjs/operators/transformation/buffercount.md)
  * [bufferTime](/learn-rxjs/operators/transformation/buffertime.md) ⭐
  * [bufferToggle](/learn-rxjs/operators/transformation/buffertoggle.md)
  * [bufferWhen](/learn-rxjs/operators/transformation/bufferwhen.md)
  * [concatMap](/learn-rxjs/operators/transformation/concatmap.md) ⭐
  * [concatMapTo](/learn-rxjs/operators/transformation/concatmapto.md)
  * [expand](/learn-rxjs/operators/transformation/expand.md)
  * [exhaustMap](/learn-rxjs/operators/transformation/exhaustmap.md)
  * [groupBy](/learn-rxjs/operators/transformation/groupby.md)
  * [map](/learn-rxjs/operators/transformation/map.md) ⭐
  * [mapTo](/learn-rxjs/operators/transformation/mapto.md)
  * [mergeMap / flatMap](/learn-rxjs/operators/transformation/mergemap.md) ⭐
  * [mergeScan](/learn-rxjs/operators/transformation/mergescan.md)
  * [partition](/learn-rxjs/operators/transformation/partition.md)
  * [pluck](/learn-rxjs/operators/transformation/pluck.md)
  * [reduce](/learn-rxjs/operators/transformation/reduce.md)
  * [scan](/learn-rxjs/operators/transformation/scan.md) ⭐
  * [switchMap](/learn-rxjs/operators/transformation/switchmap.md) ⭐
  * [switchMapTo](/learn-rxjs/operators/transformation/switchmapto.md)
  * [toArray](/learn-rxjs/operators/transformation/toarray.md)
  * [window](/learn-rxjs/operators/transformation/window.md)
  * [windowCount](/learn-rxjs/operators/transformation/windowcount.md)
  * [windowTime](/learn-rxjs/operators/transformation/windowtime.md)
  * [windowToggle](/learn-rxjs/operators/transformation/windowtoggle.md)
  * [windowWhen](/learn-rxjs/operators/transformation/windowwhen.md)
* [Utility](/learn-rxjs/operators/utility.md)
  * [tap / do](/learn-rxjs/operators/utility/do.md) ⭐
  * [delay](/learn-rxjs/operators/utility/delay.md)
  * [delayWhen](/learn-rxjs/operators/utility/delaywhen.md)
  * [dematerialize](/learn-rxjs/operators/utility/dematerialize.md)
  * [finalize / finally](/learn-rxjs/operators/utility/finalize.md)
  * [let](/learn-rxjs/operators/utility/let.md)
  * [repeat](/learn-rxjs/operators/utility/repeat.md)
  * [repeatWhen](https://github.com/btroncone/learn-rxjs/blob/master/operators/utility/repeatwhen.md)
  * [timeInterval](/learn-rxjs/operators/utility/timeinterval.md)
  * [timeout](/learn-rxjs/operators/utility/timeout.md)
  * [timeoutWith](/learn-rxjs/operators/utility/timeoutwith.md)
  * [toPromise](/learn-rxjs/operators/utility/topromise.md)

⭐ - *commonly used*

### Additional Resources

* [What Are Operators?](http://reactivex.io/rxjs/manual/overview.html#operators) 📰 - Official Docs
* [What Operators Are](https://egghead.io/lessons/rxjs-what-rxjs-operators-are) 🎥 💵 - André Staltz


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