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Returns the numeric position of the last (rightmost) occurrence of a character string within another character string.
RAT(cSearchExpression, cExpressionSearched [, nOccurrence]) |
Parameters
- cSearchExpression
- Specifies the character expression that RAT(В ) looks for in cExpressionSearched. The character expression can refer to a memo field of any size.
- cExpressionSearched
- Specifies the character expression that RAT(В ) searches. The character expression can refer to a memo field of any size.
- nOccurrence
- Specifies which occurrence, starting from the right and moving left, of cSearchExpression RAT(В ) searches for in cExpressionSearched. By default, RAT(В ) searches for the last occurrence of cSearchExpression (nOccurrence = 1). If nOccurrence is 2, RAT(В ) searches for the next to last occurrence, and so on.
Return Value
Numeric
Remarks
RAT(В ), the reverse of the AT(В ) function, searches the character expression in cExpressionSearched starting from the right and moving left, looking for the last occurrence of the string specified in cSearchExpression.
RAT(В ) returns an integer indicating the position of the first character in cSearchExpression in cExpressionSearched. RAT(В ) returns 0 if cSearchExpression isn't found in cExpressionSearched, or if nOccurrence is greater than the number of times cSearchExpression occurs in cExpressionSearched.
The search performed by RAT(В ) is case-sensitive.
Example
| В |  Copy Code |
|---|---|
STORE 'abracadabra' TO string STORE 'a' TO find_str CLEAR ? RAT(find_str,string) && Displays 11 ? RAT(find_str,string,3) && Displays 6 | |