Disable arc in Xcode

  1. Select your project configuration
  2. Go to the "Build Settings" tab
  3. Search for "automatic"
  4. Click the "Objective-C Automatic Reference Counting" line and choose "No"
  5. Done
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Change hostname in Mac OSX

sudo scutil --set HostName yourHostname.local
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Uninstall XCode and OSX Developer Tools

Open the Terminal.app and execute the following command:

sudo /Developer/Library/uninstall-devtools –mode=all
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Disable standby mode in iOS

To prevent the iPhone to enter the sleep mode after a certain time, just add the following line:

[[UIApplication sharedApplication] setIdleTimerDisabled:YES];
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UIViewController initialization

UIViewController is loaded from NIB:

- (id)initWithCoder:(NSCoder *)coder {
    self = [super initWithCoder:coder];    
    if (self) {
    return self;

- (void)awakeFromNib {

UIViewController is created programmatically:

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
    return self;
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SVN merge without mergeinfo

If you are about to merge a branch back into trunk and experience the following error, you are using svn 1.4 or your admin forgot to update your repository.

svn merge --reintegrate http://svn/calc/branches/my-calc-branch

Querying mergeinfo requires version 3 of the FSFS filesystem schema;

In this case you could use:

svn merge http://svn/calc/trunk@X http://svn/calc/branches/my-calc-branch


svn merge -r X:HEAD http://svn/calc/branches/my-calc-branch

where X is either the revision you created your branch from or the revision you last merged into your branch.


Prevent reload of android webview on orientation change

Just add this attribute to your activity:

<activity android:configChanges="keyboardHidden|orientation"...
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Enable MySQL query log on Mac OSX

  1. Create my.cnf:

    $ sudo vim /etc/my.cnf
  2. Add this to my.cnf:

  3. Create log file:

    $ sudo touch /var/log/mysql-query.log
    $ sudo chown _mysql /var/log/mysql-query.log
  4. Restart MySQL through MySQL Preference Pane.

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Django with bpython shell on Mac OSX/Linux

  1. Add this line to your .profile:

    export PYTHONSTARTUP=~/.pythonrc.py
  2. Download .pythonrc.py and copy it to your home directory:

        from django.core.management import setup_environ
        import settings
        from django.db.models.loading import get_models, get_apps
        for app in get_apps():
            app_models = get_models(app)
            if not app_models:
            model_labels = ", ".join([model.__name__ for model in app_models])        
                exec("from %s import *" % app.__name__)
                print "From '%s' autoload: %s" % (app.__name__.split('.')[-2], model_labels)
                print "Not imported for '%s'" % app.__name__.split('.')[-2]
  3. Close current terminal and open a new one.

  4. Change to your django project directory an start bpython. If everthing went fine you should see a list of your imported models:

    From 'auth' autoload: Permission, Group, User, Message
    From 'contenttypes' autoload: ContentType
    From 'sessions' autoload: Session
    From 'sites' autoload: Site
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