Basic array comparison algorithm

Question

I\'m trying to follow the steps found here on comparing two arrays, and knowing when to create a new object, but I just don\'t understand how it works:

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Answer 1

Something like this:

NSArray *wholeList = [[NSArray alloc]initWithObjects:@"employee1", @"employee2", @"employee3", @"employee4", @"employee5",@"employee6", nil];
NSArray *partialList = [[NSArray alloc]initWithObjects:@"employee2", @"employee13", @"employee7", nil];

for (id employeeID in partialList)  //get one employee from the partialList
{
    if (![wholeList containsObject:employeeID])  //check to see if it is in the wholeList
    {
        NSLog(@"This employee is not in the wholeList: %@", employeeID);
        // do create new employee object for this employeeID, whatever...
    }
}