SortedSet<T>.RemoveWhere(Predicate<T>) Method

Definition

Namespace:

System.Collections.Generic

Assemblies:

netstandard.dll, System.Collections.dll

Source:

SortedSet.cs

Removes all elements that match the conditions defined by the specified predicate from a SortedSet<T>.

C#

public int RemoveWhere(Predicate<T> match);

Parameters

match

Predicate<T>

The delegate that defines the conditions of the elements to remove.

Returns

Int32

The number of elements that were removed from the SortedSet<T> collection.

Exceptions

ArgumentNullException

match is null.

Examples

The following example removes unwanted elements from a sorted set. This code example is part of a larger example provided for the SortedSet<T> class.

C#

// Defines a predicate delegate to use
// for the SortedSet.RemoveWhere method.
private static bool IsDoc(string s)
{
    s = s.ToLower();
    return (s.EndsWith(".txt") ||
        s.EndsWith(".xls") ||
        s.EndsWith(".xlsx") ||
        s.EndsWith(".pdf") ||
        s.EndsWith(".doc") ||
        s.EndsWith(".docx"));
}

C#

// Remove elements that have non-media extensions.
// See the 'IsDoc' method.
Console.WriteLine("Remove docs from the set...");
Console.WriteLine($"\tCount before: {mediaFiles1.Count}");
mediaFiles1.RemoveWhere(IsDoc);
Console.WriteLine($"\tCount after: {mediaFiles1.Count}");

Remarks

match must not modify the SortedSet<T>. Doing so can cause unexpected results.

Calling this method is an O(n) operation, where n is Count.

Applies to