,System.Func{--0,System.Boolean},System.Func{--0,--1})}
ReactiveExtensions.WhereSelect(IObservable, Func, Func) method¶
Defined in
Type: ReactiveExtensions
Namespace: ReactiveUI.Extensions
Assembly: ReactiveUI.Extensions.dll
Applies to
net10.0, net10.0-browserwasm1.0, net10.0-desktop1.0, net9.0, net9.0-browserwasm1.0, net9.0-desktop1.0, net8.0, net8.0-ios17.5, net8.0-maccatalyst17.5, net8.0-macos14.2, net8.0-macos14.5, net8.0-tvos17.2, netstandard2.1, net462, net481
public static IObservable<TOut> WhereSelect<TIn, TOut>(this IObservable<TIn> source, Func<TIn, bool> predicate, Func<TIn, TOut> selector)
Summary:
Fused Where(predicate).Select(selector). Allocates a single observer
per subscription instead of two, eliminating the intermediate operator that
the equivalent Rx chain would build.
Type parameters
| Name | Description |
|---|---|
TIn | The source element type. |
TOut | The projected element type. |
Parameters
| Name | Type | Description |
|---|---|---|
source | IObservable | The source observable. |
predicate | Func | Filter applied to each source element. |
selector | Func | Projection applied to elements that pass predicate. |
Returns: IObservable