Question

I have filled a NSMutableArray with integer and string values from my database.
The problem is that many values were inserted more than once.
Using the following code I remove duplicate objects

for (id object in originalArray) {
    if (![singleArray containsObject:object]) {
        [singleArray addObject:object];
    }
}

Bus this works only if the objects are exactly the same between them.
Is there a way to remove duplicates based on the integer value?

EDIT (from an OP’s comment on a deleted answer)

I have some objects containing int and NSString. For example @"John 13", @"Mary 25", @"Luke 25", @"Joan 13". The NSMutableArray will contain all four names and duplicates of 13, 25. I want to remove the duplicates leaving 13 and 25 only once in the array. I do not care which names will be removed. Care only for the integer values to use them later.

Answer 1

If your elements are all NSNumber objects:

for (int i=0;i<array.count;i++) {
    for (int j=i+1;j<array.count;j++) {
        if ([array[i] isEqualToNumber:array[j]]) {
           [array removeObjectAtIndex:j--];
        }
    }
}

Or if all objects are either integer NSNumbers or NSStrings containing integer values:

for (int i=0;i<array.count;i++) {
    for (int j=i+1;j<array.count;j++) {
        if ([array[i] intValue] == [array[j] intValue]) {
           [array removeObjectAtIndex:j--];
        }
    }
}