NSPointerArray compact method that actually works.

NSPointerArray+CALCompact.h

#import <Foundation/Foundation.h>

@interface NSPointerArray (CALCompact)
- (void)cal_compact;
@end

NSPointerArray+CALCompact.m

#import "NSPointerArray+CALCompact.h"

@implementation NSPointerArray (CALCompact)


- (void) cal_compact {
    // NSPointerArray.compact doesn't work..! Should remove null entries but doesn't!
    // workaround from https://gist.github.com/sberan/6342401d78674c3831ba
    for (NSInteger i = self.count - 1; i >= 0; i--) {
        id obj = [self pointerAtIndex:(NSUInteger) i];
        if (!obj) {
            [self removePointerAtIndex:(NSUInteger) i];
        }
    }
}
@end