RAt 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
SyntaxRequest Example
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The position of cSearch within cTarget.
If cSearch is not found, RAt() returns 0.
Parameters
- 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: DWordThe 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.
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:
If the path is unspecified, FilePath() returns a NULL_STRING:
X#
1? FilePath("c:\dbf\sales.dbf") // c:\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