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Operator: Last#470

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benjchristensen merged 2 commits intoReactiveX:masterfrom
benjchristensen:operator-last
Nov 7, 2013
Merged

Operator: Last#470
benjchristensen merged 2 commits intoReactiveX:masterfrom
benjchristensen:operator-last

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Adds Observable.last and fixes behavior of BlockingObservable.last based on email discussion with @headinthebox

Equivalent to lastAsync in Rx.Net.
It now throws an IllegalArgumentException instead of returning null if no elements are emitted.

This is based on feedback from @headinthebox confirming this expected behavior:

var xs = Observable.Range(1,0);                       		// empty sequence
int x = xs.Last().Dump();                             		// throws “sequence contains no elements”       RxJava => BlockingObservable.last()
IObservable<int> ys = xs.TakeLast(1).Dump();          // OnCompleted()                                                RxJava => Observable.takeLast(1)
IObservable<int> zs = xs.LastAsync().Dump();          // OnError(“sequence contains no elements”)    RxJava => Observable.last()
benjchristensen added a commit that referenced this pull request Nov 7, 2013
@benjchristensen benjchristensen merged commit 2a737ec into ReactiveX:master Nov 7, 2013
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@benjchristensen benjchristensen deleted the operator-last branch November 26, 2013 23:40
rickbw pushed a commit to rickbw/RxJava that referenced this pull request Jan 9, 2014
jihoonson pushed a commit to jihoonson/RxJava that referenced this pull request Mar 6, 2020
… instead of string for aggregating data of multiple instances,CircuitBreaker's | Retry's | BulkHead's or application's. (ReactiveX#471)
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