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  • Extreme.Statistics.Linq
    • LinqExtensions Class
    • LinqExtensions.Grouping(TKey, T) Class
    • LinqExtensions.Lookup(TKey, T) Class
  • LinqExtensions Class
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  • ToLookup Method Overloads
    • ToLookup(R, C, TKey) Method (DataFrame(R, C), Func(DataFrameRow(R, C), TKey))
    • ToLookup(T, TKey) Method (Vector(T), Func(T, TKey))
    • ToLookup(R, C, TKey) Method (DataFrame(R, C), Func(DataFrameRow(R, C), TKey), IEqualityComparer(TKey))
    • ToLookup(R, C, TKey, TElement) Method (DataFrame(R, C), Func(DataFrameRow(R, C), TKey), Func(DataFrameRow(R, C), TElement))
    • ToLookup(T, TKey) Method (Vector(T), Func(T, TKey), IEqualityComparer(TKey))
    • ToLookup(T, TKey, TElement) Method (Vector(T), Func(T, TKey), Func(T, TElement))
    • ToLookup(R, C, TKey, TElement) Method (DataFrame(R, C), Func(DataFrameRow(R, C), TKey), Func(DataFrameRow(R, C), TElement), IEqualityComparer(TKey))
    • ToLookup(T, TKey, TElement) Method (Vector(T), Func(T, TKey), Func(T, TElement), IEqualityComparer(TKey))
  • ToLookup(T, TKey, TElement) Method (Vector(T), Func(T, TKey), Func(T, TElement), IEqualityComparer(TKey))
LinqExtensionsToLookupT, TKey, TElement Method (VectorT, FuncT, TKey, FuncT, TElement, IEqualityComparerTKey)Extreme Optimization Numerical Libraries for .NET Professional

Namespace: Extreme.Statistics.Linq
Assembly: Extreme.Numerics.Net40 (in Extreme.Numerics.Net40.dll) Version: 6.0.16073.0 (6.0.16312.0)
Syntax

C#
VB
C++
F#
Copy
public static LinqExtensionsLookup<TKey, TElement> ToLookup<T, TKey, TElement>(
	this Vector<T> vector,
	Func<T, TKey> keySelector,
	Func<T, TElement> elementSelector,
	IEqualityComparer<TKey> comparer
)
<ExtensionAttribute>
Public Shared Function ToLookup(Of T, TKey, TElement) ( 
	vector As Vector(Of T),
	keySelector As Func(Of T, TKey),
	elementSelector As Func(Of T, TElement),
	comparer As IEqualityComparer(Of TKey)
) As LinqExtensionsLookup(Of TKey, TElement)
public:
[ExtensionAttribute]
generic<typename T, typename TKey, typename TElement>
static LinqExtensionsLookup<TKey, TElement>^ ToLookup(
	Vector<T>^ vector, 
	Func<T, TKey>^ keySelector, 
	Func<T, TElement>^ elementSelector, 
	IEqualityComparer<TKey>^ comparer
)
[<ExtensionAttribute>]
static member ToLookup : 
        vector : Vector<'T> * 
        keySelector : Func<'T, 'TKey> * 
        elementSelector : Func<'T, 'TElement> * 
        comparer : IEqualityComparer<'TKey> -> LinqExtensionsLookup<'TKey, 'TElement> 

Parameters

vector
Type: Extreme.Mathematics.GenericVectorT
keySelector
Type: SystemFuncT, TKey
elementSelector
Type: SystemFuncT, TElement
comparer
Type: System.Collections.GenericIEqualityComparerTKey

Type Parameters

T
TKey
TElement

Return Value

Type: LinqExtensionsLookupTKey, TElement

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type VectorT. 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).
Version Information

Numerical Libraries

Supported in: 5.x
See Also

Reference

LinqExtensions Class
ToLookup Overload
Extreme.Statistics.Linq Namespace

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