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ReactiveExtensions.SelectConstant(IObservable, TResult) 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<TResult> SelectConstant<TSource, TResult>(this IObservable<TSource> source, TResult constant)

View source

Summary: Projects every source element to a stored constant, avoiding the closure allocation of .Select(_ => value). Common in fire-then-return-value chains.

Type parameters

Name	Description
`TSource`	The source element type (ignored).
`TResult`	The result element type.

Parameters

Name	Type	Description
`source`	IObservable	The source observable whose values are ignored.
`constant`	`TResult`	The constant value emitted for each source element.

Returns: IObservable -- An observable that emits constant for each source element.