Enumerable.CountBy<TSource,TKey> Metodo

Riferimento

Definizione

Spazio dei nomi:: System.Linq

Assembly:: System.Linq.dll

Origine:: CountBy.cs

Importante

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public static System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,int>> CountBy<TSource,TKey> (this System.Collections.Generic.IEnumerable<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IEqualityComparer<TKey>? keyComparer = default);

static member CountBy : seq<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IEqualityComparer<'Key> -> seq<System.Collections.Generic.KeyValuePair<'Key, int>>

<Extension()>
Public Function CountBy(Of TSource, TKey) (source As IEnumerable(Of TSource), keySelector As Func(Of TSource, TKey), Optional keyComparer As IEqualityComparer(Of TKey) = Nothing) As IEnumerable(Of KeyValuePair(Of TKey, Integer))

Parametri di tipo

TSource

TKey

Parametri

source: IEnumerable<TSource>

keySelector: Func<TSource,TKey>

keyComparer: IEqualityComparer<TKey>

Restituisce

IEnumerable<KeyValuePair<TKey,Int32>>

Si applica a

Prodotto	Versioni
.NET	9

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