NSCollections+MPTidbits.m

//
//  NSCollections+MPTidbits.m
//  MPTidbits
//
//  Created by Matt Patenaude on 12/22/08.
//  Copyright (C) 2008 - 09 Matt Patenaude.
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//  
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//  
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

#import "NSCollections+MPTidbits.h"
#import "NSString+MPTidbits.h"


@implementation NSArray(MPTidbits)

- (BOOL)isEmpty
{
	return ([self count] == 0);
}

@end

@implementation NSDictionary(MPTidbits)

- (BOOL)isEmpty
{
	return ([self count] == 0);
}
- (BOOL)containsKey:(NSString *)aKey
{
	return [self containsKey:aKey allowEmptyValue:YES];
}
- (BOOL)containsKey:(NSString *)aKey allowEmptyValue:(BOOL)allowEmpty
{
	BOOL keyExists = [[self allKeys] containsObject:aKey];
	if (keyExists)
	{
		if (allowEmpty)
			return YES;
		else
		{
			id obj = [self objectForKey:aKey];
			if ([obj isEqual:[NSNull null]])
				return NO;
			if ([obj respondsToSelector:@selector(isEmpty)] && [obj isEmpty])
				return NO;
			return YES;
		}
	}
	return NO;
}

@end