,--1,System.Func{--1,--0,--1})} ,System.Func{--0,--0,--0})}

Observable.Scan(IObservable, TAccumulate, Func) method¶

Defined in

Type: Observable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

Overloads¶

1. public static IObservable<TAccumulate> Scan<TSource, TAccumulate>(this IObservable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, TAccumulate> accumulator)
2. public static IObservable<TSource> Scan<TSource>(this IObservable<TSource> source, Func<TSource, TSource, TSource> accumulator)

1. Overload¶

public static IObservable<TAccumulate> Scan<TSource, TAccumulate>(this IObservable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, TAccumulate> accumulator)

Summary: Applies an accumulator function over an observable sequence and returns each intermediate result. The specified seed value is used as the initial accumulator value. For aggregation behavior with no intermediate results, see Aggregate.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TAccumulate`	The type of the result of the aggregation.

Parameters

Name	Type	Description
`source`	IObservable	An observable sequence to accumulate over.
`seed`	`TAccumulate`	The initial accumulator value.
`accumulator`	Func	An accumulator function to be invoked on each element.

Returns: IObservable -- An observable sequence containing the accumulated values.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `accumulator` is null.

2. Overload¶

public static IObservable<TSource> Scan<TSource>(this IObservable<TSource> source, Func<TSource, TSource, TSource> accumulator)

Summary: Applies an accumulator function over an observable sequence and returns each intermediate result. For aggregation behavior with no intermediate results, see Aggregate.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence and the result of the aggregation.

Parameters

Name	Type	Description
`source`	IObservable	An observable sequence to accumulate over.
`accumulator`	Func	An accumulator function to be invoked on each element.

Returns: IObservable -- An observable sequence containing the accumulated values.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `accumulator` is null.