MoreEnumerablePartialSortByTSource, TKey(IEnumerableTSource, Int32, FuncTSource, TKey) Method

Combines OrderByTSource, TKey(IEnumerableTSource, FuncTSource, TKey, IComparerTKey), and TakeTSource(IEnumerableTSource, Int32) in a single operation.

Definition

Namespace: MoreLinq
Assembly: MoreLinq (in MoreLinq.dll) Version: 4.4.0+6d97c3b1d482f98300f4446df14742b0e3fafbec

C#

public static IEnumerable<TSource> PartialSortBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	int count,
	Func<TSource, TKey> keySelector
)

VB

<ExtensionAttribute>
Public Shared Function PartialSortBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	count As Integer,
	keySelector As Func(Of TSource, TKey)
) As IEnumerable(Of TSource)

C++

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IEnumerable<TSource>^ PartialSortBy(
	IEnumerable<TSource>^ source, 
	int count, 
	Func<TSource, TKey>^ keySelector
)

F#

[<ExtensionAttribute>]
static member PartialSortBy : 
        source : IEnumerable<'TSource> * 
        count : int * 
        keySelector : Func<'TSource, 'TKey> -> IEnumerable<'TSource>

Parameters

source IEnumerableTSource: The source sequence.
count Int32: Number of (maximum) elements to return.
keySelector FuncTSource, TKey: A function to extract a key from an element.

Type Parameters

TSource: Type of elements in the sequence.
TKey: Type of keys.

Return Value

IEnumerableTSource
A sequence containing at most top count elements from source, in ascending order of their keys.

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).

Remarks

This operator uses deferred execution and streams it results.