|   | ![[ Previous ]](navbprev.gif)  ![[ Contents ]](navbhome.gif)  ![[ Index ]](navbhelp.gif)  ![[ Next ]](navbnext.gif)  | 
    int Ns_SetUnique(
    Ns_Set *set,
    char *key
    );
Ns_SetUnique returns 1 if the specified key is unique in the specified set and 0 if it is not. The test for uniqueness is performed case-sensitively. The case-insensitive counterpart to this function is Ns_SetIUnique.