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

Observable.Any(IObservable) method¶

Defined in

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

Applies to

netstandard2.0

Overloads¶

1. public static IObservable<bool> Any<TSource>(this IObservable<TSource> source)
2. public static IObservable<bool> Any<TSource>(this IObservable<TSource> source, Func<TSource, bool> predicate)

1. Overload¶

public static IObservable<bool> Any<TSource>(this IObservable<TSource> source)

Summary: Determines whether an observable sequence contains any elements.

Type parameters

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

Parameters

Name	Type	Description
`source`	IObservable	An observable sequence to check for non-emptiness.

Returns: IObservable -- An observable sequence containing a single element determining whether the source sequence contains any elements.

Remarks

The return type of this operator differs from the corresponding operator on IEnumerable in order to retain asynchronous behavior.

Exceptions

Type	Condition
System.ArgumentNullException	`source` is null.

2. Overload¶

public static IObservable<bool> Any<TSource>(this IObservable<TSource> source, Func<TSource, bool> predicate)

Summary: Determines whether any element of an observable sequence satisfies a condition.

Type parameters

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

Parameters

Name	Type	Description
`source`	IObservable	An observable sequence whose elements to apply the predicate to.
`predicate`	Func	A function to test each element for a condition.

Returns: IObservable -- An observable sequence containing a single element determining whether any elements in the source sequence pass the test in the specified predicate.

Remarks

The return type of this operator differs from the corresponding operator on IEnumerable in order to retain asynchronous behavior.

Exceptions

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