DryadLinqQueryable.ApplyWithPartitionIndex(T1, T2) Method

DryadLinqQueryable ApplyWithPartitionIndex T1, T2 Method

DryadLINQ documentation

Computes a user-defined function on each partition of the input. The function takes a partition and its partition index as arguments.

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 IQueryable<T2> ApplyWithPartitionIndex<T1, T2>(
	this IQueryable<T1> source,
	Expression<Func<IEnumerable<T1>, int, IEnumerable<T2>>> procFunc
)

public static IQueryable<T2> ApplyWithPartitionIndex<T1, T2>(
	this IQueryable<T1> source,
	Expression<Func<IEnumerable<T1>, int, IEnumerable<T2>>> procFunc
)

<ExtensionAttribute> 
Public Shared Function ApplyWithPartitionIndex(Of T1, T2) ( 
	source As IQueryable(Of T1),
	procFunc As Expression(Of Func(Of IEnumerable(Of T1), Integer, IEnumerable(Of T2)))
) As IQueryable(Of T2)

<ExtensionAttribute> 
Public Shared Function ApplyWithPartitionIndex(Of T1, T2) ( 
	source As IQueryable(Of T1),
	procFunc As Expression(Of Func(Of IEnumerable(Of T1), Integer, IEnumerable(Of T2)))
) As IQueryable(Of T2)

public:
[ExtensionAttribute]
generic<typename T1, typename T2>
static IQueryable<T2>^ ApplyWithPartitionIndex(
	IQueryable<T1>^ source, 
	Expression<Func<IEnumerable<T1>^, int, IEnumerable<T2>^>^>^ procFunc
)

public:
[ExtensionAttribute]
generic<typename T1, typename T2>
static IQueryable<T2>^ ApplyWithPartitionIndex(
	IQueryable<T1>^ source, 
	Expression<Func<IEnumerable<T1>^, int, IEnumerable<T2>^>^>^ procFunc
)

Parameters

source: Type: System.Linq IQueryable T1
The input dataset

procFunc: Type: System.Linq.Expressions Expression Func IEnumerable T1 , Int32, IEnumerable T2
The function to apply to each partition

Type Parameters

T1: The type of the input records
T2: The type of the output records

Return Value

Type: IQueryable T2
An IQueryable formed by concatenating the results of applying the function to each partition

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryable T1 . 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).