RAt2 Function | |
Return the position of the last occurrence of a substring within a string.
Namespace:
XSharp.Core
Assembly:
XSharp.Core (in XSharp.Core.dll) Version: 2.21
Syntax FUNCTION RAt2(
cSearch AS STRING,
cTarget AS STRING
) AS DWORD
public static uint RAt2(
string cSearch,
string cTarget
)
Request Example
View SourceParameters
- cSearch
- Type: String
The substring for which to search. - cTarget
- Type: String
The string in which to search. (To specify an offset, use RAt3()).
Return Value
Type:
DWord
The position of
cSearch within
cTarget.
If
cSearch is not found, RAt() returns 0.
Remarks
RAt() is like At(), which returns the position of the first occurrence of a substring within another string.
If you only need to know whether a substring exists within another string, use the InStr() function or the $ operator.
Both the RAt() and At() functions are used with Substr(), Left(), and Right() to extract substrings.
Examples
This example uses RAt() to create a function, FilePath(), that extracts the path from a file specification.
If the path is unspecified, FilePath() returns a NULL_STRING:
1? FilePath("c:\dbf\sales.dbf")
2FUNCTION FilePath(cFile AS STRING)
3 LOCAL nPos AS DWORD
4 LOCAL cFilePath AS STRING
5 IF (nPos := RAt("\", cFile)) != 0
6 cFilePath := Substr(cFile, 1, nPos)
7 ELSE
8 cFilePath := NULL_STRING
9 ENDIF
10 RETURN cFilePath
See Also Reference
RAt2(String, String)