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//
// 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
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