StringExtensionPolyfillExtensionLastIndexOfAny(String, String) Method

Returns the zero-based index position of the last occurrence of one of the specified characters in s.

Definition

Namespace: FolkerKinzel.Strings
Assembly: FolkerKinzel.Strings (in FolkerKinzel.Strings.dll) Version: 9.4.0+10a7d4d71aa960998e32ac0ac6c4fcbe4164c917

C#

public static int LastIndexOfAny(
	this string s,
	string? anyOf
)

VB

<ExtensionAttribute>
Public Shared Function LastIndexOfAny ( 
	s As String,
	anyOf As String
) As Integer

C++

public:
[ExtensionAttribute]
static int LastIndexOfAny(
	String^ s, 
	String^ anyOf
)

F#

[<ExtensionAttribute>]
static member LastIndexOfAny : 
        s : string * 
        anyOf : string -> int

Parameters

s String: The String to search.
anyOf String: A String that contains the characters to search for or null.

Return Value

Int32
The zero-based index of the last occurrence of one of the specified Unicode characters in s or -1 if none of these characters have been found.

Usage Note

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

Remarks

If the length of anyOf is less than 5, the method uses MemoryExtensions.LastIndexOfAny<T>(ReadOnlySpan<T>, ReadOnlySpan<T>) for the comparison. If the length of anyOf is greater, LastIndexOfAny(Char) is used.

Exceptions

ArgumentNullException

s is null.