DryadLinqQueryable.RangePartition(TSource, TKey) Method (IQueryable(TSource), Expression(Func(TSource, TKey)), IComparer(TKey), Boolean)

DryadLinqQueryableRangePartitionTSource, TKey Method (IQueryableTSource, ExpressionFuncTSource, TKey, IComparerTKey, Boolean)

DryadLINQ documentation

Range partition a dataset. The list of range keys are determined dynamically at runtime.

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<TSource> RangePartition<TSource, TKey>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	IComparer<TKey> comparer,
	bool isDescending
)

<ExtensionAttribute> 
Public Shared Function RangePartition(Of TSource, TKey) ( 
	source As IQueryable(Of TSource),
	keySelector As Expression(Of Func(Of TSource, TKey)),
	comparer As IComparer(Of TKey),
	isDescending As Boolean
) As IQueryable(Of TSource)

public:
[ExtensionAttribute]
generic<typename TSource, typename TKey>
static IQueryable<TSource>^ RangePartition(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, TKey>^>^ keySelector, 
	IComparer<TKey>^ comparer, 
	bool isDescending
)

Parameters

source: Type: System.LinqIQueryableTSource
The input dataset to be partitioned
keySelector: Type: System.Linq.ExpressionsExpressionFuncTSource, TKey
The function to extract the key from a record
comparer: Type: System.Collections.GenericIComparerTKey
An IComparer on TKey to compare keys
isDescending: Type: SystemBoolean
true if the generated keys must be descending; otherwise ascending

Type Parameters

TSource: The type of the records in the input dataset
TKey: The type of the key on which the partition is based

Return Value

Type: IQueryableTSource
An IQueryable partitioned according to a list of keys determined at runtime

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

RangePartition Overload

Microsoft.Research.DryadLinq Namespace