Add simple object subscripting to NSUserDefaults

NSUserDefaultsObjectSubscripting.h

//
//  NSUserDefaults+ObjectSubscripting.h
//
//  Created by Tony Arnold on 29/07/12.
//  Copyright (c) 2012 The CocoaBots. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSUserDefaults (ObjectSubscripting)

- (id)objectForKeyedSubscript:(NSString *)key;
- (void)setObject:(id)object forKeyedSubscript:(NSString *)key;

@end

NSUserDefaultsObjectSubscripting.m

//
//  NSUserDefaults+ObjectSubscripting.m
//
//  Created by Tony Arnold on 29/07/12.
//  Copyright (c) 2012 The CocoaBots. All rights reserved.
//

#import "NSUserDefaults+ObjectSubscripting.h"

@implementation NSUserDefaults (ObjectSubscripting)

- (id)objectForKeyedSubscript:(NSString *)key
{
	return [self objectForKey:key];
}

- (void)setObject:(id)object forKeyedSubscript:(NSString *)key
{
	if (CBIsEmpty(object)) {
		[self removeObjectForKey:key];
	} else {
		[self setObject:object forKey:key];
	}
}

@end

Ahh, sorry @casademora — there's a version of it here: https://gist.github.com/2010649

I'll post an updated version later on.