Added files

NSArray+DVExtention.h

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+//
+//  NSArray+NSArray_extention.h
+//
+//  Created by Dick Verbunt on 6/2/12.
+//  Copyright (c) 2012 Dickverbunt. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSArray (DVExtention)
+
+- (id)firstObject; //Get fisrst object
+- (NSArray *)shuffle; //Shuffles all objects in array
+- (NSArray *)objectsNotInArray:(NSArray *)array; //returns items that are not in the array
+
+@end

NSArray+DVExtention.m

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+//
+//  NSArray+NSArray_extention.m
+//
+//  Created by Dick Verbunt on 6/2/12.
+//  Copyright (c) 2012 Dickverbunt. All rights reserved.
+//
+
+#import "NSArray+DVExtention.h"
+
+@implementation NSArray (DVExtention)
+
+- (id)firstObject
+{
+	if (self.count > 0) {
+		return [self objectAtIndex:0];
+	}
+
+	return nil;
+}
+
+- (NSArray *)objectsNotInArray:(NSArray *)array
+{
+	NSMutableArray *tmpArray = [NSMutableArray array];
+
+	for (id object in self)
+	{
+		if(![array containsObject:object])
+		{
+			[tmpArray addObject:object];
+		}
+	}
+
+	return [NSArray arrayWithArray:tmpArray];
+}
+
+- (NSArray *)shuffle
+{
+	NSMutableArray *tmpArray = [NSMutableArray arrayWithCapacity:[self count]];
+	for (id object in self)
+	{
+		NSUInteger randomPosition = arc4random() % (tmpArray.count + 1);
+		[tmpArray insertObject:object atIndex:randomPosition];
+	}
+
+	return [NSArray arrayWithArray:tmpArray];
+}
+
+@end