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

DryadLinqQueryableAggregateTSource, TAccumulate Method (IQueryableTSource, ExpressionFuncTAccumulate, ExpressionFuncTAccumulate, 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: 0.2.1.0 (0.2.1.0)

Syntax

C++

Copy

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

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.LinqIQueryableTSource
The input sequence
seedFunc: Type: System.Linq.ExpressionsExpressionFuncTAccumulate
The function that creates the initial accumulator value
func: Type: System.Linq.ExpressionsExpressionFuncTAccumulate, 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 IQueryableTSource. 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).

Reference

DryadLinqQueryable Class

Aggregate Overload

Microsoft.Research.DryadLinq Namespace