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Qbservable.Scan<TSource>(IQbservable<TSource>, Expression<Func<TSource, TSource, TSource>>)

Qbservable.Scan<TSource> Method (IQbservable<TSource>, Expression<Func<TSource, TSource, TSource>>)

Applies an accumulator function over a queryable observable sequence and returns each intermediate result with the specified source and accumulator.

Namespace:  System.Reactive.Linq
Assembly:  System.Reactive.Providers (in System.Reactive.Providers.dll)


<ExtensionAttribute> _
Public Shared Function Scan(Of TSource) ( _
    source As IQbservable(Of TSource), _
    accumulator As Expression(Of Func(Of TSource, TSource, TSource)) _
) As IQbservable(Of TSource)
Dim source As IQbservable(Of TSource)
Dim accumulator As Expression(Of Func(Of TSource, TSource, TSource))
Dim returnValue As IQbservable(Of TSource)

returnValue = source.Scan(accumulator)
public static IQbservable<TSource> Scan<TSource>(
    this IQbservable<TSource> source,
    Expression<Func<TSource, TSource, TSource>> accumulator
generic<typename TSource>
static IQbservable<TSource>^ Scan(
    IQbservable<TSource>^ source, 
    Expression<Func<TSource, TSource, TSource>^>^ accumulator
static member Scan : 
        source:IQbservable<'TSource> * 
        accumulator:Expression<Func<'TSource, 'TSource, 'TSource>> -> IQbservable<'TSource> 
JScript does not support generic types and methods.

Type Parameters

  • TSource
    The type of source.


Return Value

Type: System.Reactive.Linq.IQbservable<TSource>
A queryable 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 IQbservable<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see or .

See Also


Qbservable Class

Scan Overload

System.Reactive.Linq Namespace