Update table with a comma seperated string

I have a string of id's and True or False values. I could have 50000 pairs. Like: "2,t,6,t,9,f" I am new to oracle and I am tring to make a package. so basically I need to look threw the string for update active(t or f) where id=number

I am new to Oracle. Below does not seem to work. I don't get any errors

AS

PROCEDURE Update_Route_Camera(
CSArray IN VARCHAR2)
IS
i NUMBER;
x number;
y varchar2(1);
BEGIN
-- initialise

i := 0;
LOOP
i := i+1;
EXIT WHEN instr(CSArray, ',', 1, i) = 0;
-- get first value

x := to_number(trim(substr(CSArray, instr(CSArray, ',', 1, i)-1, 1)));
-- get second value

i := i+1;
y := trim(substr(CSArray, instr(CSArray, ',', 1, i)-1, 1)); update rtcamera set rtcamera.ACTIVE = y where id = x; END LOOP;
END Update_Route_Camera;
END Update_Route_Camera_pkg; Received on Wed May 12 2004 - 11:26:45 CDT