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ObservableAsync.AnyAsync(IObservableAsync, Func?, CancellationToken) 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 ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this, Func<T, bool>? predicate, CancellationToken cancellationToken)
2. public static ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this)
3. public static ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this, CancellationToken cancellationToken)

1. Overload¶

public static ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this, Func<T, bool>? predicate, CancellationToken cancellationToken)

Summary: Asynchronously determines whether any element in the sequence satisfies the specified predicate.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`predicate`	Func?	A function to test each element for a condition. If null, the method checks whether the sequence contains any elements.
`cancellationToken`	CancellationToken	A cancellation token that can be used to cancel the asynchronous operation.

Returns: ValueTask -- A task that represents the asynchronous operation. The task result contains true if any element satisfies the predicate or, if the predicate is null, if the sequence contains any elements; otherwise, false.

2. Overload¶

public static ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this)

View source

Summary: Asynchronously determines whether the source contains any elements.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.

Returns: ValueTask -- A task that represents the asynchronous operation. The task result contains true if the source contains any elements; otherwise, false.

3. Overload¶

public static ValueTask<bool> AnyAsync<T>(this IObservableAsync<T> @this, CancellationToken cancellationToken)

View source

Summary: Asynchronously determines whether the source contains any elements.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`cancellationToken`	CancellationToken	A cancellation token that can be used to cancel the asynchronous operation.

Returns: ValueTask -- A task that represents the asynchronous operation. The task result contains true if the source contains any elements; otherwise, false.