Aggregator<T, TResult>.Create<TIntermediate, TAccumulator> Method

Creates an aggregator that converts inputs to an intermediate type before passing them to an accumulator of the specified type to perform the aggregation.

Definition

Namespace: Numerics.NET.DataAnalysis
Assembly: Numerics.NET (in Numerics.NET.dll) Version: 9.0.3

public static Aggregator<T, TResult>? Create<TIntermediate, TAccumulator>(
	Func<TAccumulator, TResult> selector,
	AggregatorAttributes attributes,
	TResult emptyValue = null
)
where TAccumulator : struct, new(), IAccumulator<TIntermediate>

Visual Basic

Public Shared Function Create(Of TIntermediate, TAccumulator As {Structure, New, IAccumulator(Of TIntermediate)}) ( 
	selector As Func(Of TAccumulator, TResult),
	attributes As AggregatorAttributes,
	Optional emptyValue As TResult = Nothing
) As Aggregator(Of T, TResult)

C++/CLI

public:
generic<typename TIntermediate, typename TAccumulator>
where TAccumulator : value class, gcnew(), IAccumulator<TIntermediate>
static Aggregator<T, TResult>^ Create(
	Func<TAccumulator, TResult>^ selector, 
	AggregatorAttributes attributes, 
	TResult emptyValue = nullptr
)

static member Create : 
        selector : Func<'TAccumulator, 'TResult> * 
        attributes : AggregatorAttributes * 
        ?emptyValue : 'TResult 
(* Defaults:
        let _emptyValue = defaultArg emptyValue null
*)
-> Aggregator<'T, 'TResult>  when 'TAccumulator : struct, new() and IAccumulator<'TIntermediate>

Parameters

selector Func<TAccumulator, TResult>: A delegate that extracts the aggregated value from the accumulator.
attributes AggregatorAttributes: Specifies properties of aggregator used to optimize its application.
emptyValue TResult (Optional): The value of the aggregation when the input is empty.

Type Parameters

TIntermediate: The intermediate type used as input for the accumulator.
TAccumulator: The type of the accumulator.

Return Value

Aggregator<T, TResult>
The requested aggregator, or null if the aggregator could not be created.

Aggregator<T, TResult>.Create<TIntermediate, TAccumulator> Method

Definition

Parameters

Type Parameters

Return Value

See Also

Reference