Observable.Scan<TSource> Method (IObservable<TSource>, Func<TSource, TSource, TSource>)
Applies an accumulator function over an observable sequence and returns each intermediate result with the specified source and accumulator.
Namespace: System.Reactive.Linq
Assembly: System.Reactive (in System.Reactive.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function Scan(Of TSource) ( _
source As IObservable(Of TSource), _
accumulator As Func(Of TSource, TSource, TSource) _
) As IObservable(Of TSource)
'Usage
Dim source As IObservable(Of TSource)
Dim accumulator As Func(Of TSource, TSource, TSource)
Dim returnValue As IObservable(Of TSource)
returnValue = source.Scan(accumulator)
public static IObservable<TSource> Scan<TSource>(
this IObservable<TSource> source,
Func<TSource, TSource, TSource> accumulator
)
[ExtensionAttribute]
public:
generic<typename TSource>
static IObservable<TSource>^ Scan(
IObservable<TSource>^ source,
Func<TSource, TSource, TSource>^ accumulator
)
static member Scan :
source:IObservable<'TSource> *
accumulator:Func<'TSource, 'TSource, 'TSource> -> IObservable<'TSource>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
Parameters
- source
Type: System.IObservable<TSource>
An observable sequence to accumulate over.
- accumulator
Type: System.Func<TSource, TSource, TSource>
An accumulator function to be invoked on each element.
Return Value
Type: System.IObservable<TSource>
An observable sequence containing the accumulated values.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IObservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .