DryadLinqQueryable.Aggregate(TSource, TAccumulate) Method (IQueryable(TSource), Expression(Func(TAccumulate)), Expression(Func(TAccumulate, TSource, TAccumulate)))

DryadLinqQueryable Aggregate TSource, TAccumulate Method (IQueryable TSource , Expression Func TAccumulate , Expression Func TAccumulate, TSource, TAccumulate )

DryadLINQ documentation

Applies an aggregator function over a sequence.

Namespace: Microsoft.Research.DryadLinq
Assembly: Microsoft.Research.DryadLinq (in Microsoft.Research.DryadLinq.dll) Version: 0.1.2.0 (0.1.2.0)

Syntax

C++

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public static TAccumulate Aggregate<TSource, TAccumulate>(
	this IQueryable<TSource> source,
	Expression<Func<TAccumulate>> seedFunc,
	Expression<Func<TAccumulate, TSource, TAccumulate>> func
)

public static TAccumulate Aggregate<TSource, TAccumulate>(
	this IQueryable<TSource> source,
	Expression<Func<TAccumulate>> seedFunc,
	Expression<Func<TAccumulate, TSource, TAccumulate>> func
)

<ExtensionAttribute> 
Public Shared Function Aggregate(Of TSource, TAccumulate) ( 
	source As IQueryable(Of TSource),
	seedFunc As Expression(Of Func(Of TAccumulate)),
	func As Expression(Of Func(Of TAccumulate, TSource, TAccumulate))
) As TAccumulate

<ExtensionAttribute> 
Public Shared Function Aggregate(Of TSource, TAccumulate) ( 
	source As IQueryable(Of TSource),
	seedFunc As Expression(Of Func(Of TAccumulate)),
	func As Expression(Of Func(Of TAccumulate, TSource, TAccumulate))
) As TAccumulate

public:
[ExtensionAttribute]
generic<typename TSource, typename TAccumulate>
static TAccumulate Aggregate(
	IQueryable<TSource>^ source, 
	Expression<Func<TAccumulate>^>^ seedFunc, 
	Expression<Func<TAccumulate, TSource, TAccumulate>^>^ func
)

public:
[ExtensionAttribute]
generic<typename TSource, typename TAccumulate>
static TAccumulate Aggregate(
	IQueryable<TSource>^ source, 
	Expression<Func<TAccumulate>^>^ seedFunc, 
	Expression<Func<TAccumulate, TSource, TAccumulate>^>^ func
)

Parameters

source: Type: System.Linq IQueryable TSource
The input sequence

seedFunc: Type: System.Linq.Expressions Expression Func TAccumulate
The function that creates the initial accumulator value

func: Type: System.Linq.Expressions Expression Func TAccumulate, TSource, TAccumulate
An accumualator function to apply to each element

Type Parameters

TSource: The type of the elements of source
TAccumulate: The type of the accumulator value

Return Value

Type: TAccumulate
The final accumulator value

Usage Note

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