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)
Syntax
'Declaration
<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)
'Usage
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
)
[ExtensionAttribute]
public:
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.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence to accumulate over.
- accumulator
Type: System.Linq.Expressions.Expression<Func<TSource, TSource, TSource>>
An accumulator function to be invoked on each element.
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 .