1 files changed, 27 insertions, 0 deletions
diff --git a/Volta/Additions/NSMutableArray.m b/Volta/Additions/NSMutableArray.m
new file mode 100644
index 0000000..0d7214b
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+++ b/Volta/Additions/NSMutableArray.m
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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
+\ No newline at end of file