M_CodeJam_Collections_EnumerableExtensions_DistinctBy__2_1

EnumerableExtensions.DistinctBy(TSource, TKey) Method (IEnumerable(TSource), Func(TSource, TKey), IEqualityComparer(TKey))

Returns a sequence with distinct elements from the input sequence based on the specified key and key comparer.

Namespace: CodeJam.Collections
Assembly: CodeJam (in CodeJam.dll) Version: 2.1.0.0

Syntax

C#

public static IEnumerable<TSource> DistinctBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	IEqualityComparer<TKey> comparer
)

VB

<ExtensionAttribute>
Public Shared Function DistinctBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey),
	comparer As IEqualityComparer(Of TKey)
) As IEnumerable(Of TSource)

F#

[<ExtensionAttribute>]
static member DistinctBy : 
        source : IEnumerable<'TSource> * 
        keySelector : Func<'TSource, 'TKey> * 
        comparer : IEqualityComparer<'TKey> -> IEnumerable<'TSource> 

Parameters

 

source

Type: System.Collections.Generic.IEnumerable(TSource)
The sequence to return distinct elements from.

keySelector

Type: System.Func(TSource, TKey)
A function to extract the key for each element.

comparer

Type: System.Collections.Generic.IEqualityComparer(TKey)
An IEqualityComparer(T) to compare values.

Type Parameters

 

TSource

[Missing documentation for "M:CodeJam.Collections.EnumerableExtensions.DistinctBy2(System.Collections.Generic.IEnumerable{0},System.Func{0,1},System.Collections.Generic.IEqualityComparer{1})"\]</dd><dt>TKey</dt><dd>\[Missing <typeparam name="TKey"/> documentation for "M:CodeJam.Collections.EnumerableExtensions.DistinctBy2(System.Collections.Generic.IEnumerable{0},System.Func{0,1},System.Collections.Generic.IEqualityComparer{1})"]

Return Value

Type: IEnumerable(TSource)
An IEnumerable(T) that contains distinct 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 IEnumerable(TSource). 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).

See Also

Reference

EnumerableExtensions Class
DistinctBy Overload
CodeJam.Collections Namespace