DryadLinqQueryable.Fork(T, R1, R2, R3) Method (IQueryable(T), Expression(Func(T, ForkTuple(R1, R2, R3))))

DryadLinqQueryable Fork T, R1, R2, R3 Method (IQueryable T , Expression Func T, ForkTuple R1, R2, R3 )

DryadLINQ documentation

Forks one input dataset into three output datasets. A specified user-defined function is applied to each input element to produce zero or one element for each output dataset.

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 IMultiQueryable<R1, R2, R3> Fork<T, R1, R2, R3>(
	this IQueryable<T> source,
	Expression<Func<T, ForkTuple<R1, R2, R3>>> mapper
)

public static IMultiQueryable<R1, R2, R3> Fork<T, R1, R2, R3>(
	this IQueryable<T> source,
	Expression<Func<T, ForkTuple<R1, R2, R3>>> mapper
)

<ExtensionAttribute> 
Public Shared Function Fork(Of T, R1, R2, R3) ( 
	source As IQueryable(Of T),
	mapper As Expression(Of Func(Of T, ForkTuple(Of R1, R2, R3)))
) As IMultiQueryable(Of R1, R2, R3)

<ExtensionAttribute> 
Public Shared Function Fork(Of T, R1, R2, R3) ( 
	source As IQueryable(Of T),
	mapper As Expression(Of Func(Of T, ForkTuple(Of R1, R2, R3)))
) As IMultiQueryable(Of R1, R2, R3)

public:
[ExtensionAttribute]
generic<typename T, typename R1, typename R2, typename R3>
static IMultiQueryable<R1, R2, R3>^ Fork(
	IQueryable<T>^ source, 
	Expression<Func<T, ForkTuple<R1, R2, R3>>^>^ mapper
)

public:
[ExtensionAttribute]
generic<typename T, typename R1, typename R2, typename R3>
static IMultiQueryable<R1, R2, R3>^ Fork(
	IQueryable<T>^ source, 
	Expression<Func<T, ForkTuple<R1, R2, R3>>^>^ mapper
)

Parameters

source: Type: System.Linq IQueryable T
The input dataset

mapper: Type: System.Linq.Expressions Expression Func T, ForkTuple R1, R2, R3
The function applied to each record of the input

Type Parameters

T: The type of records of input dataset
R1: The type of records of the first output dataset
R2: The type of records of the second output dataset
R3: The type of records of the third output dataset

Return Value

Type: IMultiQueryable R1, R2, R3
An IMultiQueryable for the three output datasets

Usage Note

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