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Qbservable.DistinctUntilChanged(Of TSource) Method (IQbservable(Of TSource), IEqualityComparer(Of TSource))

Returns a queryable observable sequence that contains only distinct contiguous elements according to the comparer.

Namespace:  System.Reactive.Linq
Assembly:  System.Reactive.Providers (in System.Reactive.Providers.dll)

'Declaration
<ExtensionAttribute> _
Public Shared Function DistinctUntilChanged(Of TSource) ( _
	source As IQbservable(Of TSource), _
	comparer As IEqualityComparer(Of TSource) _
) As IQbservable(Of TSource)
'Usage
Dim source As IQbservable(Of TSource)
Dim comparer As IEqualityComparer(Of TSource)
Dim returnValue As IQbservable(Of TSource)

returnValue = source.DistinctUntilChanged(comparer)

Type Parameters

TSource

The type of source.

Parameters

source
Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence to retain distinct contiguous elements for.
comparer
Type: System.Collections.Generic.IEqualityComparer(Of TSource)
The equality comparer for computed key values.

Return Value

Type: System.Reactive.Linq.IQbservable(Of TSource)
A queryable observable sequence only containing the distinct contiguous elements from the source sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQbservable(Of TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see http://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or http://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
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