DryadLinqQueryable.LongSelectMany(TSource, TCollection, TResult) Method (IQueryable(TSource), Expression(Func(TSource, Int64, IEnumerable(TCollection))), Expression(Func(TSource, TCollection, TResult)))

DryadLinqQueryableLongSelectManyTSource, TCollection, TResult Method (IQueryableTSource, ExpressionFuncTSource, Int64, IEnumerableTCollection, ExpressionFuncTSource, TCollection, TResult)

DryadLINQ documentation

Transforms each element of a sequence into an IEnumerable{T} by applying a function to the element and its index, and then flattens the resulting sequences into one 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++

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public static IQueryable<TResult> LongSelectMany<TSource, TCollection, TResult>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, long, IEnumerable<TCollection>>> selector,
	Expression<Func<TSource, TCollection, TResult>> resultSelector
)

<ExtensionAttribute> 
Public Shared Function LongSelectMany(Of TSource, TCollection, TResult) ( 
	source As IQueryable(Of TSource),
	selector As Expression(Of Func(Of TSource, Long, IEnumerable(Of TCollection))),
	resultSelector As Expression(Of Func(Of TSource, TCollection, TResult))
) As IQueryable(Of TResult)

public:
[ExtensionAttribute]
generic<typename TSource, typename TCollection, typename TResult>
static IQueryable<TResult>^ LongSelectMany(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, long long, IEnumerable<TCollection>^>^>^ selector, 
	Expression<Func<TSource, TCollection, TResult>^>^ resultSelector
)

Parameters

source: Type: System.LinqIQueryableTSource
The sequence of input elements
selector: Type: System.Linq.ExpressionsExpressionFuncTSource, Int64, IEnumerableTCollection
A transform function to apply to each source element; the second parameter of the function represents the index of the source element.
resultSelector: Type: System.Linq.ExpressionsExpressionFuncTSource, TCollection, TResult
A transformation function to apply to each intermediate element

Type Parameters

TSource: The type of the elements of source
TCollection: The type of the element in the intermediate IEnumerable sequences
TResult: The type of the elements of the result

Return Value

Type: IQueryableTResult
The sequence resulting from applying

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selector

to each input element and flattening and transforming the elements in the intermediate sequences

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

LongSelectMany Overload

Microsoft.Research.DryadLinq Namespace