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ObservableAsync.ContainsAsync(IObservableAsync, T, IEqualityComparer?) 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> ContainsAsync<T>(this IObservableAsync<T> @this, T value, IEqualityComparer<T>? comparer)
2. public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value, IEqualityComparer<T>? comparer, CancellationToken cancellationToken)
3. public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value)
4. public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value, CancellationToken cancellationToken)

1. Overload¶

public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value, IEqualityComparer<T>? comparer)

View source

Summary: Asynchronously determines whether the sequence contains a specified value using the given equality comparer.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`value`	`T`	The value to locate in the sequence.
`comparer`	IEqualityComparer?	The equality comparer to use for comparing values, or null to use the default equality comparer for the type.

Returns: ValueTask -- A task that represents the asynchronous operation. The task result contains true if the value is found in the sequence; otherwise, false.

2. Overload¶

public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value, IEqualityComparer<T>? comparer, CancellationToken cancellationToken)

Summary: Asynchronously determines whether the sequence contains a specified value using the given equality comparer.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`value`	`T`	The value to locate in the sequence.
`comparer`	IEqualityComparer?	The equality comparer to use for comparing values, or null to use the default equality comparer for the type.
`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 value is found in the sequence; otherwise, false.

3. Overload¶

public static ValueTask<bool> ContainsAsync<T>(this IObservableAsync<T> @this, T value)

View source

Summary: Asynchronously determines whether the collection contains a specified value.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`value`	`T`	The value to locate in the collection.

Returns: ValueTask -- A task that represents the asynchronous operation. The task result contains true if the value is found in the collection; otherwise, false.

4. Overload¶

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

View source

Summary: Asynchronously determines whether the collection contains a specified value.

Type parameters

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

Parameters

Name	Type	Description
`this`	[IObservableAsync](#	The source observable sequence.
`value`	`T`	The value to locate in the collection.
`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 value is found in the collection; otherwise, false.