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• Cocos 2D v1.0.1 : Crash at changing CCMenuItemImage normal image

  - by Max

  I retrieve a crash log file, which, after XCode analysis on my archive show the problematic line of code : Date/Time: 2012-12-08 23:48:08.930 +0100 OS Version: iPhone OS 5.1.1 (9B206) Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Last Exception Backtrace: 0 CoreFoundation 0x31a4088f __exceptionPreprocess + 163 1 libobjc.A.dylib 0x3188b259 objc_exception_throw + 33 2 CoreFoundation 0x31a40789 +[NSException raise:format:] + 1 3 Foundation 0x374c73a3 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 91 4 Killer 0x0017ed35 -[CCSprite initWithFile:] (CCSprite.m:201) 5 Killer 0x0017e419 +[CCSprite spriteWithFile:] (CCSprite.m:93) 6 Killer 0x00123101 -[Player makeZombie] (Player.m:1363) 7 Killer 0x00105a51 -[PlayScene endOfKilling:] (PlayScene.m:1438) Which clearly indicates the second of the two following lines is crashing: NSLog(@"images %@ %@",self.zombieImage,self.zombieImageDown); [self.characterSprite setNormalImage:[CCSprite spriteWithFile:self.zombieImage]]; I know that the crash seem to happend when the user is touching the corresponding CCMeanuItemImage, is there a problem if the user is touching it, while we change the normal et selected images of it ? Is this the right manner to change its image (i do it several times during the game) ? Thanks for your ideas

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• Troubles moving a UIView.

  - by Joshua

  I have been trying to move a UIView by following a users touch. I have almost got it to work except for one thing, the UIView keeps flicking between two places. Here's the code I have been using: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { NSLog(@"touchDown"); UITouch *touch = [touches anyObject]; firstTouch = [touch locationInView:self.view]; lastTouch = [touch locationInView:self.view]; [self.view setNeedsDisplay]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { InSightViewController *contentView = [[InSightViewController alloc] initWithNibName:@"SubView" bundle:[NSBundle mainBundle]]; [contentView loadView]; UITouch *touch = [touches anyObject]; currentTouch = [touch locationInView:self.view]; if (CGRectContainsPoint(contentView.view.bounds, firstTouch)) { NSLog(@"touch in subView/contentView"); sub.frame = CGRectMake(currentTouch.x - 50.0, currentTouch.y, 130.0, 21.0); } NSLog(@"touch moved"); lastTouch = currentTouch; [self.view setNeedsDisplay]; } And here's what's been happening: http://cl.ly/Sjx

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• Is it inefficient to access a python class member container in a loop statement?

  - by Dave

  Hi there. I'm trying to adopt some best practices to keep my python code efficient. I've heard that accessing a member variable inside of a loop can incur a dictionary lookup for every iteration of the loop, so I cache these in local variables to use inside the loop. My question is about the loop statement itself... if I have the following class: class A(object): def init(self) self.myList = [ 'a','b','c', 'd', 'e' ] Does the following code in a member function incur one, or one-per-loop-iteration (5) dictionary lookups? for letter in self.myList: print letter IE, should I adopt the following pattern, if I am concerned about efficiency... localList = self.myList for letter in localList: print letter or is that actually LESS efficient due to the local variable assign? Note, I am aware that early optimization is a dangerous pitfall if I'm concerned about the overall efficiency of code development. Here I am specifically asking about the efficiency of the code, not the coding. Thanks in advance! D

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• When I select any segment in segmentControll it doesnot show highlighted

  - by rathodrc

  NSArray *itemArray = [NSArray arrayWithObjects:@"one", @"Two", @"Three", nil]; segmentControl = [[UISegmentedControl alloc] initWithItems:itemArray]; segmentControl.frame = CGRectMake(5, 5, 325, 35); segmentControl.segmentedControlStyle = UISegmentedControlStyleBar; segmentControl.tintColor = [UIColor blackColor]; [self changeUISegmentFont:segmentControl]; //[self.view addSubview:segmentControl]; self.navigationItem.titleView = segmentControl; [segmentControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; This is my code of segment control and my problem is .. When I select any segment it does not show me that that segment is selected.. I mean it is not shown highlighted.. can Anyone tell me what the problem is??

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• In google app engine, how to iterate through form fields (python, wsgiref.handlers)

  - by MarcoB

  Using python and wsgiref.handlers, I can get a single variable from a form with self.handler.request.get(var_name), but how do I iterate through all form variables, be they from GET and POST? Is it something like this? for field in self.handler.request.fields: value = self.handler.request.get(field) Again, it should include both fields included in the POST and fields from the query string, as in a GET request. Thanks in advance folks...

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• Global NSMutableArray doesn't seem to be holding values

  - by diatrevolo

  I have a Cocos2D iPhone application that requires a set of CGRects overlaid on an image to detect touches within them. "Data" below is a class that holds values parsed from an XML file. "delegateEntries" is a NSMutableArray that contains several "data" objects, pulled from another NSMutableArray called "entries" that lives in the application delegate. For some strange reason, I can get at these values without problems in the init function, but further down the class in question, I try to get at these values, and the application crashes without an error message (as an example, I put in the "ccTouchBegan" method which accessess this data through the "populateFieldsForTouchedItem" method. Can anyone see why these values would not be accessible from other methods? No objects get released until dealloc. Thanks in advance! @synthesize clicked, delegate, data, image, blurImage, normalImage, arrayOfRects, delegateEntries; - (id)initWithTexture:(CCTexture2D *)aTexture { if( (self=[super initWithTexture:aTexture] )) { arrayOfRects = [[NSMutableArray alloc] init]; delegateEntries = [[NSMutableArray alloc] init]; delegate = (InteractivePIAppDelegate *)[[UIApplication sharedApplication] delegate]; delegateEntries = [delegate entries]; data = [delegateEntries objectAtIndex:0]; NSLog(@"Assigning %@", [[delegateEntries objectAtIndex:0] backgroundImage]); NSLog(@"%@ is the string", [[data sections] objectAtIndex:0]); //CGRect rect; NSLog(@"Count of array is %i", [delegateEntries count]); //collect as many items as there are XML entries for(int i=0; i<[delegateEntries count]; i++) { if([[delegateEntries objectAtIndex:i] xPos]) { NSLog(@"Found %i items", i+1); [arrayOfRects addObject:[NSValue valueWithCGRect:CGRectMake([[[delegateEntries objectAtIndex:i] xPos] floatValue], [[[delegateEntries objectAtIndex:i] yPos] floatValue], [[[delegateEntries objectAtIndex:i] xBounds] floatValue], [[[delegateEntries objectAtIndex:i] yBounds] floatValue])]]; } else { NSLog(@"Nothing"); } } //remove the following once the NSMutableArray from above works (legacy) blurImage = [[NSString alloc] initWithString:[data backgroundBlur]]; NSLog(@"5"); normalImage = [[NSString alloc] initWithString:[data backgroundImage]]; clicked = NO; } return self; } And then: - (void)populateFieldsForTouchedItem:(TouchedRect)touchInfo { Data *touchDatum = [[Data alloc] init]; touchDatum = [[self delegateEntries] objectAtIndex:touchInfo.recordNumber]; NSLog(@"Assigning %@", [[[self delegateEntries] objectAtIndex:touchInfo.recordNumber] backgroundImage]); rect = [[arrayOfRects objectAtIndex:touchInfo.recordNumber] CGRectValue]; image = [[NSString alloc] initWithString:[[touchDatum sections] objectAtIndex:0]]; [touchDatum release]; } - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event { TouchedRect touchInfo = [self containsTouchLocation:touch]; NSLog(@"Information pertains to %i", touchInfo.recordNumber); if ( !touchInfo.touched && !clicked ) { //needed since the touch location changes when zoomed NSLog(@"NOPE"); return NO; } [self populateFieldsForTouchedItem:touchInfo]; NSLog(@"YEP"); return YES; }

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• wcf net.tcp service fails to start when extra properties are set

  - by Pharabus

  i have a current project that runs fine with a self hosted net.tcp binding if I uses the following host.AddServiceEndpoint(typeof(IMonitorService), new NetTcpBinding() {PortSharingEnabled = false }, ""); host.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexTcpBinding(), "mex"); however if I ammend to the below it fails to run with the message that there is already an endpoint on the port, can anyone explain why adding the extra properties causes it to fail? host.AddServiceEndpoint(typeof(IMonitorService), new NetTcpBinding() {PortSharingEnabled = false,ListenBacklog=1000,ReceiveTimeout=new TimeSpan(0,3,0) }, ""); host.AddServiceEndpoint(ServiceMetadataBehavior.MexContractName, MetadataExchangeBindings.CreateMexTcpBinding(), "mex"); Edit: testing confirms that the ReceiveTimeout property works Ok, as soon as I add the MaxConnections or ListenBacklog the service fails start Edit 2: this link seems to imply i ned portsharing is i want to modify these properies, not sure I am understanding it.

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• UIGraphicsBeginImageContext question in Objective C

  - by Henry D'Andrea

  I need the UIGraphicsBeginImageContext(self.view.frame.size); changed to where the .frame part pulls from webView - (void) save { UIGraphicsBeginImageContext(self.view.frame.size); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); NSLog(@"TEST"); } WEBVIEW CODE: -(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)ntype { NSLog(@"Scheme: %@", request.URL.scheme); if ([request.URL.scheme isEqualToString:@"save"]) { [self save]; } return true; }

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• Getting count() of class static array

  - by xylar

  Is it possible to get the count of a class defined static array? For example: class Model_Example { const VALUE_1 = 1; const VALUE_2 = 2; const VALUE_3 = 3; public static $value_array = array( self::VALUE_1 => 'boing', self::VALUE_2 => 'boingboing', self::VALUE_3 => 'boingboingboing', ); public function countit() { // count number $total = count(self::$value_array ); echo ': '; die($total); } } At the moment calling the countit() method returns :

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• C# style properties in python

  - by 3D-Grabber

  I am looking for a way to define properties in Python similar to C#, with nested get/set definitions. This is how far I got: #### definition #### def Prop(fcn): f = fcn() return property(f['get'], f['set']) #### test #### class Example(object): @Prop def myattr(): def get(self): return self._value def set(self, value): self._value = value return locals() # <- how to get rid of this? e = Example() e.myattr = 'somevalue' print e.myattr The problem with this is, that it still needs the definition to 'return locals()'. Is there a way to get rid of it? Maybe with a nested decorator?

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• Celery / Django Single Tasks being run multiple times

  - by felix001

  I'm facing an issue where I'm placing a task into the queue and it is being run multiple times. From the celery logs I can see that the same worker is running the task ... [2014-06-06 15:12:20,731: INFO/MainProcess] Received task: input.tasks.add_queue [2014-06-06 15:12:20,750: INFO/Worker-2] starting runner.. [2014-06-06 15:12:20,759: INFO/Worker-2] collection started [2014-06-06 15:13:32,828: INFO/Worker-2] collection complete [2014-06-06 15:13:32,836: INFO/Worker-2] generation of steps complete [2014-06-06 15:13:32,836: INFO/Worker-2] update created [2014-06-06 15:13:33,655: INFO/Worker-2] email sent [2014-06-06 15:13:33,656: INFO/Worker-2] update created [2014-06-06 15:13:34,420: INFO/Worker-2] email sent [2014-06-06 15:13:34,421: INFO/Worker-2] FINISH - Success However when I view the actual logs of the application it is showing 5-6 log lines for each step (??). Im using Django 1.6 with RabbitMQ. The method for placing into the queue is via placing a delay on a function. This function (task decorator is added( then calls a class which is run. Has anyone any idea on the best way to troubleshoot this ? Edit : As requested heres the code, views.py In my view im sending my data to the queue via ... from input.tasks import add_queue_project add_queue_project.delay(data) tasks.py from celery.decorators import task @task() def add_queue_project(data): """ run project """ logger = logging_setup(app="project") logger.info("starting project runner..") f = project_runner(data) f.main() class project_runner(): """ main project runner """ def __init__(self,data): self.data = data self.logger = logging_setup(app="project") def self.main(self): .... Code settings.py THIRD_PARTY_APPS = ( 'south', # Database migration helpers: 'crispy_forms', # Form layouts 'rest_framework', 'djcelery', ) import djcelery djcelery.setup_loader() BROKER_HOST = "127.0.0.1" BROKER_PORT = 5672 # default RabbitMQ listening port BROKER_USER = "test" BROKER_PASSWORD = "test" BROKER_VHOST = "test" CELERY_BACKEND = "amqp" # telling Celery to report the results back to RabbitMQ CELERY_RESULT_DBURI = "" CELERY_IMPORTS = ("input.tasks", ) celeryd The line im running is to start celery, python2.7 manage.py celeryd -l info Thanks,

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• Python's string.translate() doesn't fully work?

  - by Rhubarb

  Given this example, I get the error that follows: print u'\2033'.translate({2033:u'd'}) C:\Python26\lib\encodings\cp437.pyc in encode(self, input, errors) 10 11 def encode(self,input,errors='strict'): ---> 12 return codecs.charmap_encode(input,errors,encoding_map) 13 14 def decode(self,input,errors='strict'): UnicodeEncodeError: 'charmap' codec can't encode character u'\x83' in position 0

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• How to load file into mysql DB on a shared hosting platform?

  - by Vasu

  A process running on my machine collects data from various websites and stores it in the local mysql db. Same data is exported using SELECT INTO OUTFILE and FTPed to the shared host every few hours. My hosting provider doesn't allow LOAD DATA INFILE to be executed on the shared host? What are my other options for automated/scheduled load to MYSQL db on my shared host?

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• Getting Memory allocation problem at UIBarButtonItem in Iphone sdk.

  - by monish

  Hi guys, Here I am getting memory allocation problem at UIBarButtonItem and the related code for that is: toolbar = [UIToolbar new]; toolbar.barStyle = UIBarStyleBlackOpaque; [toolbar setFrame:CGRectMake(0, 350,320,20)]; [self.view addSubview:toolbar]; UIBarButtonItem* barItem1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:@selector(categoryConfig:)] ; rightBarItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:self action:@selector(dialogOtherAction:)] ; UIBarButtonItem* barItem2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:@selector(categoryConfig:)] ; NSArray *items = [NSArray arrayWithObjects: barItem1,rightBarItem,barItem2, nil]; [barItem1 release]; [barItem2 release]; [rightBarItem release]; [toolbar setItems:items animated:NO]; after adding UIBarButtonItems into the array items I released them.even though its showing allocations at barbuttons. can any help me for this? Thank you, Monish.

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• iphone selecting a row to change view

  - by Rob J

  I have created the view Controllers and attached those to control their respective views. I can't figure out how to make the following code to go the right views though. (This is in the root view controller:) - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { RunViewController *runViewController = [[RunViewController alloc] initWithNibName:@"RunView" bundle:[NSBundle mainBundle]]; CalcViewController *calcViewController = [[CalcViewController alloc] initWithNibName:@"CalcView" bundle:[NSBundle mainBundle]]; PushViewController *pushViewController = [[PushViewController alloc] initWithNibName:@"PushView" bundle:[NSBundle mainBundle]]; SitViewController *sitViewController = [[SitViewController alloc] initWithNibName:@"SitView" bundle:[NSBundle mainBundle]]; TimerViewController *timerViewController = [[TimerViewController alloc] initWithNibName:@"TimerView" bundle:[NSBundle mainBundle]]; [self.navigationController pushViewController:runViewController animated:YES]; [runViewController release]; [self.navigationController pushViewController:pushViewController animated:YES]; [pushViewController release]; [self.navigationController pushViewController:sitViewController animated:YES]; [sitViewController release]; [self.navigationController pushViewController:timerViewController animated:YES]; [timerViewController release]; [self.navigationController pushViewController:calcViewController animated:YES]; [calcViewController release]; runViewController = nil; pushViewController = nil; sitViewController = nil; timerViewController = nil; calcViewController = nil; } Each time I select any of the rows in the table - all of the views come up. How do I arrange them to only open the view that it is supposed to?

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• Synchronous communication using NSOperationQueue

  - by chip_munks

  I am new to Objective C programming. I have created two threads called add and display using the NSInvocationOperation and added it on to the NSOperationQueue. I make the display thread to run first and then run the add thread. The display thread after printing the "Welcome to display" has to wait for the results to print from the add method. So i have set the waitUntilFinished method. Both the Operations are on the same queue. If i use waitUntilFinished for operations on the same queue there may be a situation for deadlock to happen(from apples developer documentation). Is it so? To wait for particular time interval there is a method called waitUntilDate: But if i need to like this wait(min(100,dmax)); let dmax = 20; How to do i wait for these conditions? It would be much helpful if anyone can explain with an example. EDITED: threadss.h ------------ #import <Foundation/Foundation.h> @interface threadss : NSObject { BOOL m_bRunThread; int a,b,c; NSOperationQueue* queue; NSInvocationOperation* operation; NSInvocationOperation* operation1; NSConditionLock* theConditionLock; } -(void)Thread; -(void)add; -(void)display; @end threadss.m ------------ #import "threadss.h" @implementation threadss -(id)init { if (self = [super init]) { queue = [[NSOperationQueue alloc]init]; operation = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(display) object:nil]; operation1 = [[NSInvocationOperation alloc]initWithTarget:self selector:@selector(add) object:nil]; theConditionLock = [[NSConditionLock alloc]init]; } return self; } -(void)Thread { m_bRunThread = YES; //[operation addDependency:operation1]; if (m_bRunThread) { [queue addOperation:operation]; } //[operation addDependency:operation1]; [queue addOperation:operation1]; //[self performSelectorOnMainThread:@selector(display) withObject:nil waitUntilDone:YES]; //NSLog(@"I'm going to do the asynchronous communication btwn the threads!!"); //[self add]; //[operation addDependency:self]; sleep(1); [queue release]; [operation release]; //[operation1 release]; } -(void)add { NSLog(@"Going to add a and b!!"); a=1; b=2; c = a + b; NSLog(@"Finished adding!!"); } -(void)display { NSLog(@"Into the display method"); [operation1 waitUntilFinished]; NSLog(@"The Result is:%d",c); } @end main.m ------- #import <Foundation/Foundation.h> #import "threadss.h" int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; threadss* thread = [[threadss alloc]init]; [thread Thread]; [pool drain]; return 0; } This is what i have tried with a sample program. output 2011-06-03 19:40:47.898 threads_NSOperationQueue[3812:1503] Going to add a and b!! 2011-06-03 19:40:47.898 threads_NSOperationQueue[3812:1303] Into the display method 2011-06-03 19:40:47.902 threads_NSOperationQueue[3812:1503] Finished adding!! 2011-06-03 19:40:47.904 threads_NSOperationQueue[3812:1303] The Result is:3 Is the way of invoking the thread is correct. 1.Will there be any deadlock condition? 2.How to do wait(min(100,dmax)) where dmax = 50.

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• PHP Infine Loope Problem

  - by Ashwin

  function httpGet( $url, $followRedirects=true ) { global $final_url; $url_parsed = parse_url($url); if ( empty($url_parsed['scheme']) ) { $url_parsed = parse_url('http://'.$url); } $final_url = $url_parsed; $port = $url_parsed["port"]; if ( !$port ) { $port = 80; } $rtn['url']['port'] = $port; $path = $url_parsed["path"]; if ( empty($path) ) { $path="/"; } if ( !empty($url_parsed["query"]) ) { $path .= "?".$url_parsed["query"]; } $rtn['url']['path'] = $path; $host = $url_parsed["host"]; $foundBody = false; $out = "GET $path HTTP/1.0\r\n"; $out .= "Host: $host\r\n"; $out .= "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0\r\n"; $out .= "Connection: Close\r\n\r\n"; if ( !$fp = @fsockopen($host, $port, $errno, $errstr, 30) ) { $rtn['errornumber'] = $errno; $rtn['errorstring'] = $errstr; } fwrite($fp, $out); while (!@feof($fp)) { $s = @fgets($fp, 128); if ( $s == "\r\n" ) { $foundBody = true; continue; } if ( $foundBody ) { $body .= $s; } else { if ( ($followRedirects) && (stristr($s, "location:") != false) ) { $redirect = preg_replace("/location:/i", "", $s); return httpGet( trim($redirect) ); } $header .= $s; } } fclose($fp); return(trim($body)); } This code sometimes go infinite loop. What's wrong here?

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• Problem in calling a function from different class using protocols-iphone

  - by Muniraj

  I use cocos2d for my game. In which I play a movie and have a separate overlay view for controls.The touches are detected in the overlay view. Now when the touches are detected the function in the game code has to be invoked. But the function is not detected and there is no error. I dont know what has gone wrong. Someone please help me. The code are as follows The protocol part is @protocol Protocol @required -(void) transition1:(id) sender; @end The function which is to be invoked in the game code is (void) transition1:(id) sender { [[Director sharedDirector] replaceScene: [ [Scene node] addChild: [Layer4 node] z:0] ]; } The code in the overlay view in MovieOverlayViewController.h import "Protocol.h" @interface MovieOverlayViewController : UIViewController { UIImageView *overlay; NSObject <Protocol> *transfer; } @end The code in the overlay view in MovieOverlayViewController.m @implementation MovieOverlayViewController (id)init { if ((self = [super init])) self.view = [[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease]; return self; } -(void) viewWillAppear:(BOOL)animated { overlay = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"overlay.png"]] autorelease]; [self.view addSubview:overlay]; } (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; CGPoint point = [touch locationInView:self.view]; NSLog(@"pointx: %f pointy:%f", point.x, point.y); if (CGRectContainsPoint(CGRectMake(1, 440, 106, 40), point)) { // the function is called here [transfer transition1: nil]; } else if (CGRectContainsPoint(CGRectMake(107, 440, 106, 40), point)) NSLog(@"tab 2 touched"); } (void)dealloc { [overlay release]; [super dealloc]; } @end

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• How to use accessors within the same class in Objective C?

  - by Azeworai

  Hi, I have a few properties defined in my header file like so @property (assign) bool connectivity_N; @property (assign) bool isConnected_N; In my implementation file I have an init and the synthesized properties like so @implementation Map @synthesize connectivity_N; @synthesize isConnected_N; a init to set the initial values like so -(id) init { if( (self=[super init]) ) { //initialise default properties self.connectivity_N=NO; self.isConnected_N=NO; } return self; } I'm running into an error that states Error: accessing unknown 'connectivity_N' class method. In this public method within the class +(bool) isConnectable:(directions) theDirection{ bool isTheDirectionConnectable= NO; switch (theDirection) { case north: isTheDirectionConnectable= self.connectivity_N; break; I'm not sure why is this so as I'm trying to grab the value of the property. According to the apple developer documentation "The default names for the getter and setter methods associated with a property are propertyName and setPropertyName: respectively—for example, given a property “foo”, the accessors would be foo and setFoo:" That has given me a clue that I've done something wrong here, I'm fairly new to objective C so would appreciate anyone who spends the time to explain this to me. Thanks!

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• why my code show messy code ..

  - by zjm1126

  class sss(webapp.RequestHandler): def get(self): url = "http://www.google.com/" result = urlfetch.fetch(url) if result.status_code == 200: self.response.out.write(result.content) and this view show : when i change code to this: if result.status_code == 200: self.response.out.write(result.content.decode('utf-8').encode('gb2312')) it show : so ,what i should do ? thanks

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• Django template context not working with imported class

  - by Andy Hume

  I'm using Django's templating on appengine, and am having a problem whereby a class I'm importing from another package is not correctly being made available to the template context. Broadly speaking, this is the code. The prop1 is not available in the template in the first example below, but is in the second. MyClass is identical in both cases. This does not work: from module import MyClass context = MyClass() self.response.out.write(template.render(path, context)) This does: class MyClass(object): def __init__(self): self.prop1 = "prop1" context = MyClass() self.response.out.write(template.render(path, context)) If I log the context in the above code I get: <module.MyClass object at 0x107b1e450> when it's imported, and: <__main__.MyClass object at 0x103759390> when it's defined in the same file. Any clues as to what might cause this kind of behaviour?

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• Python Threading, loading one thread after another

  - by Michael

  Hi, I'm working on a media player and am able to load in a single .wav and play it. As seen in the code below. foo = wx.FileDialog(self, message="Open a .wav file...", defaultDir=os.getcwd(), defaultFile="", style=wx.FD_MULTIPLE) foo.ShowModal() queue = foo.GetPaths() self.playing_thread = threading.Thread(target=self.playFile, args=(queue[0], 'msg')) self.playing_thread.start() But the problem is, when I try to make the above code into a loop for multiple .wav files. Such that while playing_thread.isActive == True, create and .start() the thread. Then if .isActive == False, pop queue[0] and load the next .wav file. Problem is, my UI will lock up and I'll have to terminate the program. Any ideas would be appreciated.

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• Problem implementing a UITableView that allows for multiple row selections

  - by wgpubs

  This - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; int cardNumber = indexPath.row + 1; if (cell.accessoryType == UITableViewCellAccessoryNone) { cell.accessoryType = UITableViewCellAccessoryCheckmark; if (![self.winningNumbers containsObject:[NSNumber numberWithInt:cardNumber]]) [self.winningNumbers addObject:[NSNumber numberWithInt:cardNumber]]; } else { cell.accessoryType = UITableViewCellAccessoryNone; if ([self.winningNumbers containsObject:[NSNumber numberWithInt:cardNumber]]) [self.winningNumbers removeObject:[NSNumber numberWithInt:cardNumber]]; } [tableView deselectRowAtIndexPath:indexPath animated:YES]; } ... modifies the "accessoryType" of every 6th cell INSTEAD of just the selected row. What am I missing? Thanks

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• Python style: if statements vs. boolean evaluation

  - by mkscrg

  One of the ideas of Python's design philosophy is "There should be one ... obvious way to do it." (PEP 20), but that can't always be true. I'm specifically referring to (simple) if statements versus boolean evaluation. Consider the following: if words: self.words = words else: self.words = {} versus self.words = words or {} With such a simple situation, which is preferable, stylistically speaking? With more complicated situations one would choose the if statement for readability, right?

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• How to set Main Inerface in xCode programatically

  - by Tom Tallak Solbu

  I am using Apples MultipleDetailViews http://developer.apple.com/library/ios/#samplecode/MultipleDetailViews/Introduction/Intro.html for template as a source for my iPad app. The template is using a splitviewController in the interface builder (MainWindow). In the iPhone/iPad Deployment info of the target, MainWindow is set as the "Main Interface". I want my app to also run on iPhone. This means I need to load a different xib when the app is run on an iPhone. I must then remove "MainWindow" from "Main Interface" because the app will crash when I load on an iPhone due to the splitViewController. The AppDeleagte of the template look like this: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; self.window.rootViewController = self.splitViewController; [self.window makeKeyAndVisible]; } If I remove "Main Window" from "Main Interface", how do I then need to change the APpDelegate, or maybe I need to change the MainWindow.xib to also work for iPhone?

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