CollectionExtensionsDistinctByTSource, TKey Method

Returns only the elements whose keys are distinct.

Definition

Namespace: Gemstone.Collections.CollectionExtensions
Assembly: Gemstone.Common (in Gemstone.Common.dll) Version: 1.0.110 -- Release Build+3e0464f4461df4d3e1175b13966eb47ff832554d

C#View Source Request Example

public static IEnumerable<TSource> DistinctBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	bool forwardSearch = true
)

VBView Source Request Example

<ExtensionAttribute>
Public Shared Function DistinctBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey),
	Optional forwardSearch As Boolean = true
) As IEnumerable(Of TSource)

C++View Source Request Example

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IEnumerable<TSource>^ DistinctBy(
	IEnumerable<TSource>^ source, 
	Func<TSource, TKey>^ keySelector, 
	bool forwardSearch = true
)

JavaScriptView Source Request Example

JavaScript does not support generic types or methods.

Parameters

source IEnumerableTSource: The collection of source objects.
keySelector FuncTSource, TKey: The function used to access the keys of the source objects.
forwardSearch Boolean (Optional): true to search forward in source; otherwise false to search backwards.

Type Parameters

TSource: The type of the source objects in the collection.
TKey: The type of the keys to be compared.

Return Value

IEnumerableTSource
The elements from source whose keys are distinct.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).