# Observable Instance Methods

* [amb](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/amb.html)
* [and](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/and.html)
* [asObservable](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/asobservable.html)
* [average](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/average.html)
* [buffer](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/buffer.html)
* [bufferWithCount](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/bufferwithcount.html)
* [bufferWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/bufferwithtime.html)
* [bufferWithTimeOrCount](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/bufferwithtimeorcount.html)
* [catch](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/catch.html)
* [combineLatest](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/combinelatest.html)
* [concat](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/concat.html)
* [concatAll](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/concatall.html)
* [concatMapObserver | selectConcatObserver](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/concatmapobserver.html)
* [controlled](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/controlled.html)
* [count](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/count.html)
* [debounce](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/debounce.html)
* [defaultIfEmpty](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/defaultifempty.html)
* [delay](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/delay.html)
* [delaySubscription](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/delaysubscription.html)
* [dematerialize](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/dematerialize.html)
* [distinct](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/distinct.html)
* [distinctUntilChanged](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/distinctuntilchanged.html)
* [do | doAction | tap](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/do.html)
* [doOnCompleted | tapOnCompleted](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/dooncompleted.html)
* [doOnError | tapOnError](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/doonerror.html)
* [doOnNext | tapOnNext](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/doonnext.html)
* [doWhile](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/dowhile.html)
* [elementAt](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/elementat.html)
* [every](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/every.html)
* [expand](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/expand.html)
* [extend | manySelect](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/extend.html)
* [filter | where](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/filter.html)
* [finally](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/finally.html)
* [find](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/find.html)
* [findIndex](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/findindex.html)
* [first](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/.html/README.md)
* [flatMap | selectMany](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmap.html)
* [flatMapConcat | concatMap](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmapconcat.html)
* [flatMapFirst | selectSwitchFirst](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmapfirst.html)
* [flatMapLatest](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmaplatest.html)
* [flatMapObserver | selectManyObserver](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmapobserver.html)
* [flatMapWithMaxConcurrent](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/flatmapwithmaxconcurrent.html)
* [forkJoin](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/forkjoin.html)
* [groupBy](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/groupby.html)
* [groupByUntil](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/groupbyuntil.html)
* [groupJoin](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/groupjoin.html)
* [ignoreElements](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/ignoreelements.html)
* [includes](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/includes.html)
* [indexOf](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/indexof.html)
* [isEmpty](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/isempty.html)
* [join](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/join.html)
* [jortSort](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/jortsort.html)
* [jortSortUntil](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/jortsortuntil.html)
* [last](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/last.html)
* [lastIndexOf](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/lastindexof.html)
* [let | letBind](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/let.html)
* [map | select](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/map.html)
* [materialize](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/materialize.html)
* [max](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/max.html)
* [maxBy](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/maxby.html)
* [merge](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/merge.html)
* [mergeAll](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/mergeall.html)
* [min](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/min.html)
* [minBy](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/minby.html)
* [multicast](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/multicast.html)
* [observeOn](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/observeon.html)
* [onErrorResumeNext](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/onerrorresumenext.html)
* [pairwise](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/pairwise.html)
* [partition](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/partition.html)
* [pausable](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/pausable.html)
* [pausableBuffered](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/pausablebuffered.html)
* [pipe](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/pipe.html)
* [pluck](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/pluck.html)
* [publish](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/publish.html)
* [publishLast](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/publishlast.html)
* [publishValue](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/publishvalue.html)
* [reduce](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/reduce.html)
* [repeat](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/repeat.html)
* [replay](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/replay.html)
* [retry](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/retry.html)
* [retryWhen](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/retrywhen.html)
* [scan](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/scan.html)
* [sequenceEqual](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/sequenceequal.html)
* [share](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/share.html)
* [shareReplay](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/sharereplay.html)
* [shareValue](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/sharevalue.html)
* [single](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/single.html)
* [singleInstance](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/singleinstance.html)
* [skip](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skip.html)
* [skipLast](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skiplast.html)
* [skipLastWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skiplastwithtime.html)
* [skipUntil](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skipuntil.html)
* [skipUntilWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skipuntilwithtime.html)
* [skipWhile](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skipwhile.html)
* [skipWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/skipwithtime.html)
* [slice](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/slice.html)
* [some](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/some.html)
* [startWith](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/startwith.html)
* [subscribe | forEach](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/subscribe.html)
* [subscribeOn](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/subscribeon.html)
* [subscribeOnCompleted](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/subscribeoncompleted.html)
* [subscribeOnError](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/subscribeonerror.html)
* [subscribeOnNext](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/subscribeonnext.html)
* [sum](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/sum.html)
* [switch](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/switch.html)
* [switchFirst](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/switchfirst.html)
* [take](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/take.html)
* [takeLast](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takelast.html)
* [takeLastBuffer](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takelastbuffer.html)
* [takeLastBufferWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takelastbufferwithtime.html)
* [takeLastWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takelastwithtime.html)
* [takeUntil](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takeuntil.html)
* [takeUntilWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takeuntilwithtime.html)
* [takeWhile](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takewhile.html)
* [takeWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/takewithtime.html)
* [thenDo](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/thendo.html)
* [throttle](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/throttle.html)
* [throttleLatest | sample](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/throttlelatest.html)
* [timeInterval](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/timeinterval.html)
* [timeout](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/timeout.html)
* [timestamp](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/timestamp.html)
* [toArray](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/toarray.html)
* [toMap](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/tomap.html)
* [toPromise](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/topromise.html)
* [toSet](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/toset.html)
* [transduce](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/transduce.html)
* [window](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/window.html)
* [windowWithCount](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/windowwithcount.html)
* [windowWithTime](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/windowwithtime.html)
* [windowWithTimeOrCount](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/windowwithtimeorcount.html)
* [withLatestFrom](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/withlatestfrom.html)
* [zip](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/zip.html)
* [zipIterable](https://github.com/soufatn/rxjs-book/tree/bf8b6376d5d3357f915110c3a4f92267055843f3/content/observable/observable_instance_methods/zipiterable.html)