Caution
In frameworks older than .NET 8.0, the method does not benefit from the performance benefits
of System.Buffers.SearchValues<T>.
FolkerKinzel.Strings
Read
Returns the zero-based index of the last occurrence of one of the specified
characters in span. The search begins at a specified character
position and runs a specified number of character positions backwards to the beginning
of the span.
Definition
Namespace: FolkerKinzel.Strings
Assembly: FolkerKinzel.Strings (in FolkerKinzel.Strings.dll) Version: 9.4.0+10a7d4d71aa960998e32ac0ac6c4fcbe4164c917
The zero-based index of the last occurrence of one of the specified Unicode characters in span or -1 if none of these characters have been found.
Assembly: FolkerKinzel.Strings (in FolkerKinzel.Strings.dll) Version: 9.4.0+10a7d4d71aa960998e32ac0ac6c4fcbe4164c917
C#
public static int LastIndexOfAny(
this ReadOnlySpan<char> span,
SearchValuesPolyfill<char> values,
int startIndex,
int count
)VB
<ExtensionAttribute>
Public Shared Function LastIndexOfAny (
span As ReadOnlySpan(Of Char),
values As SearchValuesPolyfill(Of Char),
startIndex As Integer,
count As Integer
) As IntegerC++
public:
[ExtensionAttribute]
static int LastIndexOfAny(
ReadOnlySpan<wchar_t> span,
SearchValuesPolyfill<wchar_t>^ values,
int startIndex,
int count
)F#
[<ExtensionAttribute>]
static member LastIndexOfAny :
span : ReadOnlySpan<char> *
values : SearchValuesPolyfill<char> *
startIndex : int *
count : int -> int Parameters
- span ReadOnlySpanChar
- The span to search.
- values SearchValuesPolyfillChar
- A set of Unicode characters to search for.
- startIndex Int32
- The start index of the search. The search is done backwards to the beginning of span.
- count Int32
- The number of characters positions to examine in span.
Return Value
Int32The zero-based index of the last occurrence of one of the specified Unicode characters in span 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 ReadOnlySpanChar. 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
Exceptions
| ArgumentNullException | values is null. |
| ArgumentOutOfRangeException | span is not Empty and
|