How to Find Duplicate Values in Arrays?

Question

I am working on SQLite and I have written a query which returns me two arrays ItemsArray and CustomersIDArray as:

ItemsArray
Element at Index 0 = Off White,
         


        

Answer 1

try this:

NSArray *copy = [ItemsArray copy];

NSInteger index = [copy count] - 1;

for (id object in [copy reverseObjectEnumerator]) {

    if ([ItemsArray indexOfObject:object inRange:NSMakeRange(0, index)] != NSNotFound) {
        [ItemsArray removeObjectAtIndex:index];
    }
    index--;
}