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How to add a WiX custom action that happens only on uninstall (via MSI)?

...modifies. According to the table above I had to use <Custom Action='CA_ID' Before='other_CA_ID'> (NOT UPGRADINGPRODUCTCODE) AND (REMOVE="ALL")</Custom> And it worked! share | ...
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What is the meaning of single and double underscore before an object name?

...owever, nothing special is done with the name itself. To quote PEP-8: _single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore. Double Underscore (Name Mangling) From the Python docs: Any identifier of th...
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Change all files and folders permissions of a directory to 644/755

... One approach could be using find: for directories find /desired_location -type d -print0 | xargs -0 chmod 0755 for files find /desired_location -type f -print0 | xargs -0 chmod 0644 share | ...
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back button callback in navigationController in iOS

...elegate if it should pop the top UINavigationItem by calling navigationBar(_:shouldPop:). UINavigationController actually implement this, but it doesn't publicly declare that it adopts UINavigationBarDelegate (why!?). To intercept this event, create a subclass of UINavigationController, declare its ...
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How can I check if a Perl array contains a particular value?

... Simply turn the array into a hash: my %params = map { $_ => 1 } @badparams; if(exists($params{$someparam})) { ... } You can also add more (unique) params to the list: $params{$newparam} = 1; And later get a list of (unique) params back: @badparams = keys %params; ...
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Proper way to declare custom exceptions in modern Python?

... (or pass extra args), do this: class ValidationError(Exception): def __init__(self, message, errors): # Call the base class constructor with the parameters it needs super(ValidationError, self).__init__(message) # Now for your custom code... self.errors = erro...
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How to import the class within the same directory or sub directory?

... Python 2 Make an empty file called __init__.py in the same directory as the files. That will signify to Python that it's "ok to import from this directory". Then just do... from user import User from dir import Dir The same holds true if the files are in a...
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How to get a variable name as a string in PHP?

... You could use get_defined_vars() to find the name of a variable that has the same value as the one you're trying to find the name of. Obviously this will not always work, since different variables often have the same values, but it's the only...
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How do I filter query objects by date range in Django?

... Use Sample.objects.filter(date__range=["2011-01-01", "2011-01-31"]) Or if you are just trying to filter month wise: Sample.objects.filter(date__year='2011', date__month='01') Edit As Bernhard Vallant said, if you want a query...
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How to apply bindValue method in LIMIT clause?

...I think this solves it. $fetchPictures->bindValue(':skip', (int) trim($_GET['skip']), PDO::PARAM_INT); share | improve this answer | follow | ...