ObservableExtensions.

SwitchMap<TSource, TResult>(IObservable<TSource>, Func<TSource, int, Task<TResult>>) Method

Summary

Projects each element of an observable sequence to a task by incorporating the element's index and merges all of the task results into one observable sequence.
Assembly
Rocket.Surgery.Reactive.Extensions.dll
Namespace
System.Reactive.Linq
Containing Type
ObservableExtensions

Syntax

public static IObservable<TResult> SwitchMap<TSource, TResult>(this IObservable<TSource> source, Func<TSource, int, Task<TResult>> selector)

Type Parameters

Name Description
TSource The type of the elements in the source sequence.
TResult The type of the result produced by the projected tasks and the elements in the merged result sequence.

Parameters

Name Type Description
source IObservable<TSource> An observable sequence of elements to project.
selector Func<TSource, int, Task<TResult>> A transform function to apply to each element; the second parameter of the function represents the index of the source element.

Return Value

Type Description
IObservable<TResult> An observable sequence whose elements are the result of the tasks executed for each element of the input sequence.