novice needing help on shuffeling an array

Posted by steffen Myklebust on Stack Overflow See other posts from Stack Overflow or by steffen Myklebust
Published on 2010-03-12T17:38:55Z Indexed on 2010/03/13 9:15 UTC
Read the original article Hit count: 207

Please help a TOTAL beginner.!

I found this post: http://stackoverflow.com/questions/56648/whats-the-best-way-to-shuffle-an-nsmutablearray

And as i try to deploy this in my own code, I cant get it working... :-(

Can anyone help me to resolve this code?

To me it looks like the shuffle function is not called..?

here is my code:

// // shuffle2ViewController.h // shuffle2

#import

@interface shuffle2ViewController : UIViewController {
NSMutableArray *puzzles; 
int *randomSort;
}

- (void)shuffle;
@end

//=============================

// shuffle2ViewController.m

´#import "shuffle2ViewController.h"

@implementation shuffle2ViewController

(void)viewDidLoad { 
[super viewDidLoad];

NSMutableArray *puzzles = [NSMutableArray arrayWithObjects:@"1",@"2",@"3", @"4",@"5",@"6",@"7",@"8",@"9", @"10",@"11",@"12", nil];

// Call the shuffle function
[self shuffle];

// print to log

int i;

NSLog(@"NEW OLD");

NSLog(@"=================");

for (i = 0; i < 12; ++i) NSLog(@" %2i %@", i + 1, [puzzles objectAtIndex:i]); }

int randomSort(id obj1, id obj2, void *context ) {
// returns random number -1 0 1
return (random()%3 - 1); }

(void)shuffle { // call custom sort function

[puzzles sortUsingFunction:randomSort context:nil]; 
}

Giving this result:

NEW OLD
=================
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12

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