,System.Linq.Expressions.Expression,System.IObservable{--1}}})}

) method¶

Defined in

Type: QbservableEx Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

Attributes: [Experimental]

public static IQbservable<TResult> Let<TSource, TResult>(this IQbservable<TSource> source, Expression<Func<IObservable<TSource>, IObservable<TResult>>> selector)

Summary: Returns an observable sequence that is the result of invoking the selector on the source sequence, without sharing subscriptions. This operator allows for a fluent style of writing queries that use the same sequence multiple times.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the result sequence.

Parameters

Name	Type	Description
`source`	[IQbservable](#	Source sequence that will be shared in the selector function.
`selector`	Expression, IObservable>>	Selector function which can use the source sequence as many times as needed, without sharing subscriptions to the source sequence.

Returns: IQbservable -- An observable sequence that contains the elements of a sequence produced by multicasting the source sequence within a selector function.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` is null.