StringExtensionIndexOfAny(String, ReadOnlySpan`1Char) Method

Returns the zero-based index of the first occurrence of one of the 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 IndexOfAny(
	this string s,
	ReadOnlySpan<char> anyOf
)

VB

<ExtensionAttribute>
Public Shared Function IndexOfAny ( 
	s As String,
	anyOf As ReadOnlySpan(Of Char)
) As Integer

C++

public:
[ExtensionAttribute]
static int IndexOfAny(
	String^ s, 
	ReadOnlySpan<wchar_t> anyOf
)

F#

[<ExtensionAttribute>]
static member IndexOfAny : 
        s : string * 
        anyOf : ReadOnlySpan<char> -> int

Parameters

s String: The String to search.
anyOf ReadOnlySpanChar: A read-only character span that contains the characters to search for.

Return Value

Int32
The zero-based index of the first occurrence of one of the specified Unicode characters in s or -1 if none of these characters have been found. If anyOf is an empty span, the method returns -1.

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.IndexOfAny<T>(ReadOnlySpan<T>, ReadOnlySpan<T>) for the comparison. If the length of anyOf is greater, String.IndexOfAny(char[]) is used.

Exceptions

ArgumentNullException

s is null.