DryadLinqQueryable.AggregateAsQuery(TSource, TAccumulate, TResult) Method (IQueryable(TSource), TAccumulate, Expression(Func(TAccumulate, TSource, TAccumulate)), Expression(Func(TAccumulate, TResult)))

DryadLinqQueryableAggregateAsQueryTSource, TAccumulate, TResult Method (IQueryableTSource, TAccumulate, ExpressionFuncTAccumulate, TSource, TAccumulate, ExpressionFuncTAccumulate, TResult)

DryadLINQ documentation

Same as AggregateTSource, TAccumulate, TResult(IQueryableTSource, TAccumulate, ExpressionFuncTAccumulate, TSource, TAccumulate, ExpressionFuncTAccumulate, TResult), but returns an IQueryable<TResult> containing a single element.

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 IQueryable<TResult> AggregateAsQuery<TSource, TAccumulate, TResult>(
	this IQueryable<TSource> source,
	TAccumulate seed,
	Expression<Func<TAccumulate, TSource, TAccumulate>> func,
	Expression<Func<TAccumulate, TResult>> selector
)

<ExtensionAttribute> 
Public Shared Function AggregateAsQuery(Of TSource, TAccumulate, TResult) ( 
	source As IQueryable(Of TSource),
	seed As TAccumulate,
	func As Expression(Of Func(Of TAccumulate, TSource, TAccumulate)),
	selector As Expression(Of Func(Of TAccumulate, TResult))
) As IQueryable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TSource, typename TAccumulate, typename TResult>
static IQueryable<TResult>^ AggregateAsQuery(
	IQueryable<TSource>^ source, 
	TAccumulate seed, 
	Expression<Func<TAccumulate, TSource, TAccumulate>^>^ func, 
	Expression<Func<TAccumulate, TResult>^>^ selector
)

Parameters

source: Type: System.LinqIQueryableTSource
The input sequence
seed: Type: TAccumulate
The initial accumulator value
func: Type: System.Linq.ExpressionsExpressionFuncTAccumulate, TSource, TAccumulate
An accumualator function to apply to each element
selector: Type: System.Linq.ExpressionsExpressionFuncTAccumulate, TResult
A function to transform the final accumulator value into the result value

Type Parameters

TSource: The type of the elements of source
TAccumulate: The type of the accumulator value
TResult: The type of the final result

Return Value

Type: IQueryableTResult
The result of applying selector to the 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

AggregateAsQuery Overload

Microsoft.Research.DryadLinq Namespace