Qbservable.Scan<TSource, TAccumulate> Method (IQbservable<TSource>, TAccumulate, Expression<Func<TAccumulate, TSource, TAccumulate>>)
Applies an accumulator function over a queryable observable sequence and returns each intermediate result with the specified source, seed and accumulator.
Namespace: System.Reactive.Linq
Assembly: System.Reactive.Providers (in System.Reactive.Providers.dll)
Syntax
'Declaration
<ExtensionAttribute> _
Public Shared Function Scan(Of TSource, TAccumulate) ( _
source As IQbservable(Of TSource), _
seed As TAccumulate, _
accumulator As Expression(Of Func(Of TAccumulate, TSource, TAccumulate)) _
) As IQbservable(Of TAccumulate)
'Usage
Dim source As IQbservable(Of TSource)
Dim seed As TAccumulate
Dim accumulator As Expression(Of Func(Of TAccumulate, TSource, TAccumulate))
Dim returnValue As IQbservable(Of TAccumulate)
returnValue = source.Scan(seed, accumulator)
public static IQbservable<TAccumulate> Scan<TSource, TAccumulate>(
this IQbservable<TSource> source,
TAccumulate seed,
Expression<Func<TAccumulate, TSource, TAccumulate>> accumulator
)
[ExtensionAttribute]
public:
generic<typename TSource, typename TAccumulate>
static IQbservable<TAccumulate>^ Scan(
IQbservable<TSource>^ source,
TAccumulate seed,
Expression<Func<TAccumulate, TSource, TAccumulate>^>^ accumulator
)
static member Scan :
source:IQbservable<'TSource> *
seed:'TAccumulate *
accumulator:Expression<Func<'TAccumulate, 'TSource, 'TAccumulate>> -> IQbservable<'TAccumulate>
JScript does not support generic types and methods.
Type Parameters
- TSource
The type of source.
- TAccumulate
The type of accumulator.
Parameters
- source
Type: System.Reactive.Linq.IQbservable<TSource>
A queryable observable sequence to accumulate over.
- seed
Type: TAccumulate
The initial accumulator value.
- accumulator
Type: System.Linq.Expressions.Expression<Func<TAccumulate, TSource, TAccumulate>>
An accumulator function to be invoked on each element.
Return Value
Type: System.Reactive.Linq.IQbservable<TAccumulate>
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 .