KGy SOFT Core Libraries Help
String
Gets the zero-based index of the last occurrence of the specified value in this StringSegment
using the specified startIndex, count and comparison.
Definition
Namespace: KGySoft.CoreLibraries
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 9.0.0
The zero-based index position of value if that ReadOnlySpan<char> is found, or -1 if it is not. If value is ReadOnlySpan<char>.Empty, the return value is the smaller of startIndex and the last index position of this StringSegment.
Assembly: KGySoft.CoreLibraries (in KGySoft.CoreLibraries.dll) Version: 9.0.0
C#
public int LastIndexOf(
ReadOnlySpan<char> value,
int startIndex,
int count,
StringComparison comparison = StringComparison.Ordinal
)VB
Public Function LastIndexOf (
value As ReadOnlySpan(Of Char),
startIndex As Integer,
count As Integer,
Optional comparison As StringComparison = StringComparison.Ordinal
) As IntegerC++
public:
int LastIndexOf(
ReadOnlySpan<wchar_t> value,
int startIndex,
int count,
StringComparison comparison = StringComparison::Ordinal
)F#
member LastIndexOf :
value : ReadOnlySpan<char> *
startIndex : int *
count : int *
?comparison : StringComparison
(* Defaults:
let _comparison = defaultArg comparison StringComparison.Ordinal
*)
-> int Parameters
- value ReadOnlySpanChar
- The ReadOnlySpan<char> to seek.
- startIndex Int32
- The search starting position.
- count Int32
- The number of character positions to examine.
- comparison StringComparison (Optional)
- A StringComparison value that specified the rules for the search. This parameter is optional.
Default value: Ordinal.
Return Value
Int32The zero-based index position of value if that ReadOnlySpan<char> is found, or -1 if it is not. If value is ReadOnlySpan<char>.Empty, the return value is the smaller of startIndex and the last index position of this StringSegment.
Remarks
If comparison is Ordinal, then no new string allocation occurs on any platforms.
If comparison is other than Ordinal, then depending on the targeted platform a new string allocation may occur. The .NET Core 3.0 and newer builds do not allocate a new string with any comparison values.