DryadLinqQueryableHashPartitionTSource, TKey, TResult Method (IQueryableTSource, ExpressionFuncTSource, TKey, IEqualityComparerTKey, ExpressionFuncTSource, TResult)DryadLINQ documentation
Hash partition a dataset. The number of resulting partitions is dynamically determined at the runtime.

Namespace: Microsoft.Research.DryadLinq
Assembly: Microsoft.Research.DryadLinq (in Microsoft.Research.DryadLinq.dll) Version: 0.2.1.0 (0.2.1.0)
Syntax

public static IQueryable<TResult> HashPartition<TSource, TKey, TResult>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TKey>> keySelector,
	IEqualityComparer<TKey> comparer,
	Expression<Func<TSource, TResult>> resultSelector
)

Parameters

source
Type: System.LinqIQueryableTSource
The dataset to be partitioned
keySelector
Type: System.Linq.ExpressionsExpressionFuncTSource, TKey
The function to extract the key from a record
comparer
Type: System.Collections.GenericIEqualityComparerTKey
An IComparer on TKey to compare keys
resultSelector
Type: System.Linq.ExpressionsExpressionFuncTSource, TResult
The function to compute output record

Type Parameters

TSource
The type of the records in the dataset
TKey
The type of the key on which the partition is based
TResult
The type of the records in the result dataset

Return Value

Type: IQueryableTResult
An IQueryable hash-partitioned according to a key

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).
See Also

Reference