Partition Generic Method

Wintellect PowerCollections

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[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

Partition a list or array based on a predicate. After partitioning, all items for which the predicate returned true precede all items for which the predicate returned false.

Namespace: Wintellect.PowerCollections
Assembly: PowerCollections (in PowerCollections.dll)

Syntax

C#
public static int Partition<T>( IList<T> list, Predicate<T> predicate )

Visual Basic (Declaration)
Public Shared Function Partition(Of T) ( _ list As IList(Of T), _ predicate As Predicate(Of T) _ ) As Integer

Visual C++
public: generic<typename T> static int Partition ( IList<T>^ list, Predicate<T>^ predicate )

Parameters

list: IList<(Of <T>)>
The list or array to partition.

predicate: Predicate<(Of <T>)>
A delegate that defines the partitioning condition.

Return Value

The index of the first item in the second half of the partition; i.e., the first item for which predicate returned false. If the predicate was true for all items in the list, list.Count is returned.

Type Parameters

T

Remarks

Although arrays cast to IList<T> are normally read-only, this method will work correctly and modify an array passed as list.