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IEnumerableExtensionsDistinctByTSource, TKey(IEnumerableTSource, FuncTSource, TKey, IEqualityComparerTKey) Method

Returns distinct elements from a sequence by using a specified key selector and equality comparer to compare values.

Definition

Namespace: DevCase.Extensions.IEnumerableExtensions
Assembly: DevCase.net48 (in DevCase.net48.dll) Version: 6.0.0.0 (6.0)
XMLNS for XAML: Not mapped to an xmlns.

C#Request Example

[EditorBrowsableAttribute(EditorBrowsableState.Always)]
public static IEnumerable<TSource> DistinctBy<TSource, TKey>(
	this IEnumerable<TSource> sequence,
	Func<TSource, TKey> selector,
	IEqualityComparer<TKey> comparer
)

VBRequest Example

<ExtensionAttribute>
<EditorBrowsableAttribute(EditorBrowsableState.Always)>
Public Shared Function DistinctBy(Of TSource, TKey) ( 
	sequence As IEnumerable(Of TSource),
	selector As Func(Of TSource, TKey),
	comparer As IEqualityComparer(Of TKey)
) As IEnumerable(Of TSource)

Dim sequence As IEnumerable(Of TSource)
Dim selector As Func(Of TSource, TKey)
Dim comparer As IEqualityComparer(Of TKey)
Dim returnValue As IEnumerable(Of TSource)

returnValue = sequence.DistinctBy(selector, 
	comparer)

C++Request Example

public:
[ExtensionAttribute]
[EditorBrowsableAttribute(EditorBrowsableState::Always)]
generic<typename TSource, typename TKey>
static IEnumerable<TSource>^ DistinctBy(
	IEnumerable<TSource>^ sequence, 
	Func<TSource, TKey>^ selector, 
	IEqualityComparer<TKey>^ comparer
)

F#Request Example

[<ExtensionAttribute>]
[<EditorBrowsableAttribute(EditorBrowsableState.Always)>]
static member DistinctBy : 
        sequence : IEnumerable<'TSource> * 
        selector : Func<'TSource, 'TKey> * 
        comparer : IEqualityComparer<'TKey> -> IEnumerable<'TSource>

ASP.NETRequest Example

No code example is currently available or this language may not be supported.

Parameters

sequence IEnumerableTSource: The sequence to remove duplicate elements from.
selector FuncTSource, TKey: A transform function to apply to each element.
comparer IEqualityComparerTKey: An IEqualityComparerT to compare keys.

Type Parameters

TSource: The type of the sequence.
TKey: The type of the key to compare.

Return Value

IEnumerableTSource
The resulting IEnumerableT.

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).