NSPredicate first example

main.m

       NSDate *today = [NSDate date];
        
        NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
        dayComponent.day = 1;
        
        NSCalendar *theCalendar = [NSCalendar currentCalendar];
        NSDate *tomorrow = [theCalendar dateByAddingComponents:dayComponent toDate:today options:0];

        dayComponent.day = -1;
        NSDate *yesterday = [theCalendar dateByAddingComponents:dayComponent toDate:today options:0];
        
        
        NSArray *datesArray = @[today, tomorrow, yesterday];
        
        NSSet *datesSet = [NSSet setWithObjects:today,tomorrow,yesterday, nil];
        
        NSPredicate *dateFromToday = [NSPredicate predicateWithFormat:@"self >= %@", today];
        
        NSArray *filteredArray = [datesArray filteredArrayUsingPredicate:dateFromToday];

        NSSet *filteredSet = [datesSet filteredSetUsingPredicate:dateFromToday];
        
        NSLog(@"Filtered Array: %@ \n", filteredArray);
        NSLog(@"Filtered Set: %@ \n", filteredSet);