,--1,System.Func{--1,--0,System.Threading.CancellationToken,System.Threading.Tasks.ValueTask{--1}})} ,--1,System.Func{--1,--0,--1})}

ObservableAsync.Scan(IObservableAsync, TAcc, Func>) method¶

Defined in

Type: ObservableAsync Namespace: ReactiveUI.Extensions.Async Assembly: ReactiveUI.Extensions.dll

Applies to

net10.0, net10.0-browserwasm1.0, net10.0-desktop1.0, net9.0, net9.0-browserwasm1.0, net9.0-desktop1.0, net8.0, net8.0-ios17.5, net8.0-maccatalyst17.5, net8.0-macos14.2, net8.0-macos14.5, net8.0-tvos17.2, netstandard2.1, net462, net481

Overloads¶

1. public static IObservableAsync<TAcc> Scan<T, TAcc>(this IObservableAsync<T> @this, TAcc seed, Func<TAcc, T, CancellationToken, ValueTask<TAcc>> accumulator)
2. public static IObservableAsync<TAcc> Scan<T, TAcc>(this IObservableAsync<T> @this, TAcc seed, Func<TAcc, T, TAcc> accumulator)

1. Overload¶

public static IObservableAsync<TAcc> Scan<T, TAcc>(this IObservableAsync<T> @this, TAcc seed, Func<TAcc, T, CancellationToken, ValueTask<TAcc>> accumulator)

View source

Summary: Applies an accumulator function over the observable sequence and returns each intermediate result using the specified asynchronous accumulator.

Type parameters

Name	Description
`T`	The type of the elements in the source sequence.
`TAcc`	The type of the accumulated value.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`seed`	`TAcc`	The initial accumulator value.
`accumulator`	Func>	An asynchronous accumulator function to be invoked on each element. Receives the current accumulator value, the current element, and a cancellation token.

Returns: IObservableAsync -- An observable sequence containing the accumulated values produced after each element is processed.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown if `accumulator` is null.

2. Overload¶

public static IObservableAsync<TAcc> Scan<T, TAcc>(this IObservableAsync<T> @this, TAcc seed, Func<TAcc, T, TAcc> accumulator)

View source

Summary: Applies an accumulator function over the observable sequence and returns each intermediate result.

Type parameters

Name	Description
`T`	The type of the elements in the source sequence.
`TAcc`	The type of the accumulated value.

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`seed`	`TAcc`	The initial accumulator value.
`accumulator`	Func	An accumulator function to be invoked on each element. Receives the current accumulator value and the current element.

Returns: IObservableAsync -- An observable sequence containing the accumulated values produced after each element is processed.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown if `accumulator` is null.