DryadLinqExtension.CheckOrderBy(TSource, TKey) Method

DryadLinqExtension CheckOrderBy TSource, TKey Method

DryadLINQ documentation

Check if each partition of the input dataset is ordered.

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

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

<ExtensionAttribute> 
Public Shared Function CheckOrderBy(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)

<ExtensionAttribute> 
Public Shared Function CheckOrderBy(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>^ CheckOrderBy(
	IQueryable<TSource>^ source, 
	Expression<Func<TSource, TKey>^>^ keySelector, 
	IComparer<TKey>^ comparer, 
	bool isDescending
)

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

Parameters

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

keySelector: Type: System.Linq.Expressions Expression Func TSource, TKey
The key extraction function

comparer: Type: System.Collections.Generic IComparer TKey
A Comparer on TKey to compare records

isDescending: Type: System Boolean
True if the check is for descending

Type Parameters

TSource: The type of the records of the input dataset
TKey: The type of the keys on which ordering is based

Return Value

Type: IQueryable TSource
The same dataset as the input

Usage Note

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