StringExtensionIndexOfAny(String, ReadOnlySpan`1Char, Int32, Int32) Method

Returns the zero-based index of the first occurrence of one of the the specified characters in s. The search begins at a specified index and a specified number of character positions are checked.

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,
	int startIndex,
	int count
)

VB

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

C++

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

F#

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

Parameters

s String: The String to search.
anyOf ReadOnlySpanChar: A read-only character span that contains the characters to search for.
startIndex Int32: The zero-based index in s at which the search starts.
count Int32: The number of characters positions to examine in s.

Return Value

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

MemoryExtensions.IndexOfAny<T>(ReadOnlySpan<T>, ReadOnlySpan<T>) is used for the comparison.

Exceptions

ArgumentNullException

s is null.

ArgumentOutOfRangeException

startIndex or count are smaller than zero

- or -

startIndex + count is larger than the number of characters in s.