//
//  NSMutableArray+Additions.m
//  popquizshow
//
//  Created by Ronny Fenrich on 2012-11-14.
//  Copyright (c) 2012 Kyle Langille. All rights reserved.
//

#import "NSMutableArray+Additions.h"




@implementation NSMutableArray (Shuffling)

- (void)shuffle
{
    NSUInteger count = [self count];
    for (NSUInteger i = 0; i < count; ++i) {
        // Select a random element between i and end of array to swap with.
        NSInteger nElements = count - i;
        NSInteger n = (arc4random() % nElements) + i;
        [self exchangeObjectAtIndex:i withObjectAtIndex:n];
    }
}

@end