RankByExtensionRankByTSource, TKey(IEnumerableTSource, FuncTSource, TKey, IComparerTKey) Method

Ranks each item in a sequence using a specified key and a caller-supplied comparer

Definition

Namespace: MoreLinq.Extensions
Assembly: MoreLinq (in MoreLinq.dll) Version: 3.4.0+b99a6a8cc504caf2d48372fe54a2f8116c59cd0c

C#

public static IEnumerable<int> RankBy<TSource, TKey>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	IComparer<TKey>? comparer
)

VB

<ExtensionAttribute>
Public Shared Function RankBy(Of TSource, TKey) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey),
	comparer As IComparer(Of TKey)
) As IEnumerable(Of Integer)

C++

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

F#

[<ExtensionAttribute>]
static member RankBy : 
        source : IEnumerable<'TSource> * 
        keySelector : Func<'TSource, 'TKey> * 
        comparer : IComparer<'TKey> -> IEnumerable<int>

Parameters

source IEnumerableTSource: The sequence of items to rank
keySelector FuncTSource, TKey: A key selector function which returns the value by which to rank items in the sequence
comparer IComparerTKey: An object that defines the comparison semantics for keys used to rank items

Type Parameters

TSource: The type of the elements in the source sequence
TKey: The type of the key used to rank items in the sequence

Return Value

IEnumerableInt32
A sequence of position integers representing the ranks of the corresponding items in the sequence

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).