LookupExtensionsToReadOnlyLookupTSource, TKey, TElement(IEnumerableTSource, FuncTSource, TKey, FuncTSource, TElement) Method

Definition

Namespace: Jodosoft.Collections
Assembly: Jodosoft.Collections (in Jodosoft.Collections.dll) Version: 2.0

C#Request Example

public static IReadOnlyLookup<TKey, TElement> ToReadOnlyLookup<TSource, TKey, TElement>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector,
	Func<TSource, TElement> elementSelector
)

VBRequest Example

<ExtensionAttribute>
Public Shared Function ToReadOnlyLookup(Of TSource, TKey, TElement) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey),
	elementSelector As Func(Of TSource, TElement)
) As IReadOnlyLookup(Of TKey, TElement)

C++Request Example

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey, typename TElement>
static IReadOnlyLookup<TKey, TElement>^ ToReadOnlyLookup(
	IEnumerable<TSource>^ source, 
	Func<TSource, TKey>^ keySelector, 
	Func<TSource, TElement>^ elementSelector
)

F#Request Example

[<ExtensionAttribute>]
static member ToReadOnlyLookup : 
        source : IEnumerable<'TSource> * 
        keySelector : Func<'TSource, 'TKey> * 
        elementSelector : Func<'TSource, 'TElement> -> IReadOnlyLookup<'TKey, 'TElement>

Parameters

source IEnumerableTSource
keySelector FuncTSource, TKey
elementSelector FuncTSource, TElement

Type Parameters

TSource
TKey
TElement

Return Value

IReadOnlyLookupTKey, TElement

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).

See Also

Reference

LookupExtensions Class

ToReadOnlyLookup Overload

Jodosoft.Collections Namespace