All the sources codespage 51

boolean isTrue(boolean b) {
        HashMap map = new HashMap();
        b = ! !b;
        if (!(!(b == !b)) == false) {
            map.put(false, !(!(b != !b)));
        }
        return !map.containsKey(b) & (!true | !false);
    }

public void swap(Object a, Object b) {
    Object temp = a;
    a = b;
    b = temp;
}

if !if object_exists(facebook_app) {instance_create(x+0,y+0,facebook_app)} other if object_exists(facebook_app) {with(facebook_app) instance_destroy();}