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MoreEnumerablePartitionTKey, TElement, TResult Method (IEnumerableIGroupingTKey, TElement, TKey, IEqualityComparerTKey, FuncIEnumerableTElement, IEnumerableIGroupingTKey, TElement, TResult)

Partitions a grouping and projects a result from group elements matching a key and those groups that do not. An additional parameter specifies how to compare keys for equality.

Namespace:  MoreLinq
Assembly:  MoreLinq (in MoreLinq.dll) Version: 2.4.0
Syntax
public static TResult Partition<TKey, TElement, TResult>(
	this IEnumerable<IGrouping<TKey, TElement>> source,
	TKey key,
	IEqualityComparer<TKey> comparer,
	Func<IEnumerable<TElement>, IEnumerable<IGrouping<TKey, TElement>>, TResult> resultSelector
)

Parameters

source
Type: System.Collections.GenericIEnumerableIGroupingTKey, TElement
The source sequence.
key
Type: TKey
The key to partition on.
comparer
Type: System.Collections.GenericIEqualityComparerTKey
The comparer for keys.
resultSelector
Type: SystemFuncIEnumerableTElement, IEnumerableIGroupingTKey, TElement, TResult
Function that projects the result from elements of the group matching key and those groups that do not (in the order in which they appear in source), passed as arguments.

Type Parameters

TKey
Type of keys in source groupings.
TElement
Type of elements in source groupings.
TResult
Type of the result.

Return Value

Type: TResult
The return value from resultSelector.

Usage Note

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