reversePosIndex

reversePosIndex(substr: String;
                index:  Integer): Integer;

The reversePosIndex method of the String primitive type returns the position of the last occurrence of the substring specified in the substr parameter, in a string formed from the first character of the receiving string up to (and including) the character position specified in the index parameter.

The following example shows the use of the reversePosIndex method.

vars
    stringValue : String;
    count       : Integer;
begin
    stringValue := "car->taxi->bus->train";
    count := stringValue.length;
    while count > 0 do
        count := stringValue.reversePosIndex('->', count);
        write count;
        count := count - 1;
    endwhile;
    // Outputs 15
    // Outputs 10
    // Outputs 4
    // Outputs 0
end;

This method returns zero (0) if the specified substring is not found.