Scan(TSource, TAccumulate) Method (IQbservable(TSource), TAccumulate, Expression(Func(TAccumulate, TSource, TAccumulate)))

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)

static member Scan : 
        source:IQbservable<'TSource> * 
        seed:'TAccumulate * 
        accumulator:Expression<Func<'TAccumulate, 'TSource, 'TAccumulate>> -> IQbservable<'TAccumulate> 

Type Parameters


The type of source.


The type of accumulator.


Type: System.Reactive.Linq.IQbservable(TSource)
A queryable observable sequence to accumulate over.
Type: TAccumulate
The initial accumulator value.
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
© 2016 Microsoft