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POCan't quite get the randomization down
 

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  1. POCan't quite get the randomization down
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    <p>I have built a specialized card application. What it does is allow a user to 'draw' a card, then view the card, and place it back in a random place in the deck. The only problem that I am having is that, more often than not, the card is being placed at the top of the deck.</p> <p>Here is the contents of the .h file:</p> <pre><code>@class _Card; @interface _Deck : NSObject @property (readonly) NSString *deckData; @property (readonly) NSUInteger count; @property (readonly) NSUInteger deckCount; @property (readonly) BOOL needsReset; @property (readonly) NSArray *cards; - (id)initWithArray:(NSArray *)array; - (id)initWithContentsOfFile:(NSString *)filePath; - (void)shuffle; - (NSArray *)draw; - (void)reset; - (void)changeEdition; @end </code></pre> <p>Now, here is my draw method, which will draw a card (more than one if the cards so specify it) and then place that card back into the deck, if it is allowed:</p> <pre><code>- (NSArray *)draw { // first, we create an array that can be returned, populated with the // cards that we drew NSMutableArray *drawArray = [[[NSMutableArray alloc] init] autorelease]; // next, we get the top card, which is actually located in the // indexArray (I use this for shuffling, pulling cards, etc.) NSNumber *index = [[[indexArray objectAtIndex:0] retain] autorelease]; // now we get the card that the index corresponds to // from the cards array _Card *card = [cards objectAtIndex:[index integerValue]]; // now I remove the index that we // got from the indexArray...don't worry, // it might be put back in [indexArray removeObject:index]; // if the card is supposed to discard after // draw, we leave it out if(!card.discard) { int insertIndex = arc4random_uniform(indexArray.count); // then I insert the card into the deck using the random, random // number [indexArray insertObject:index atIndex:insertIndex]; } _Card *cardCopy = [card copy]; // we add the card to the array // that we will return [drawArray addObject:cardCopy]; // next, if the card is not the final card... if(!card.final) { // ...and the card has an // additional draw specified... if(card.force) { // we keep drawing until we need to stop [drawArray addObjectsFromArray:[self draw]]; } } return drawArray; } </code></pre> <p>Is there anything that I may be doing wrong? If you need any more information, please let me know. Thanks in advance for any help that you can provide.</p>
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