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MySQL InnoDB not releasing disk space after deleting data rows from table
...ma when you introduce the partitioning for your table like - Unique Keys, Indexes to include partition column etc.
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Elegant ways to support equivalence (“equality”) in Python classes
When writing custom classes it is often important to allow equivalence by means of the == and != operators. In Python, this is made possible by implementing the __eq__ and __ne__ special methods, respectively. The easiest way I've found to do this is the following method:
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
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Yep, I realize that all the warnings came from my Heroku scripts and logs. I'll assume that (a) it's the plugin injections and (b) that the Heroku team will fix this before it becomes an actual problem.
– fearless_fool
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Error: Argument is not a function, got undefined
...econd" is always the problem. I often forget to import my controllers into index.html
– msanford
Feb 18 '14 at 16:18
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How do I access named capturing groups in a .NET Regex?
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Use the group collection of the Match object, indexing it with the capturing group name, e.g.
foreach (Match m in mc){
MessageBox.Show(m.Groups["link"].Value);
}
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Create a dictionary with list comprehension
...;
Notice the use of enumerate here to get a list of alphabets and their indexes in the list and swapping the alphabets and indices to generate the key value pair for dictionary
Hope it gives a good idea of dictionary comp to you and encourages you to use it more often to make your code compact
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MVVM in WPF - How to alert ViewModel of changes in Model… or should I?
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RaisePropertyChanged("ViewModelCopyOfSomeProperty");
}
But typically this is only needed if more than one object will be making changes to the Model's data, which is not usually the case.
If you ever have a case where you don't actually have a reference to your Model property to attach t...
Exporting functions from a DLL with dllexport
...ain C exports, use a C project not C++. C++ DLLs rely on name-mangling for all the C++isms (namespaces etc...). You can compile your code as C by going into your project settings under C/C++->Advanced, there is an option "Compile As" which corresponds to the compiler switches /TP and /TC.
If you ...
How do you write tests for the argparse portion of a python module? [closed]
...turn parser.parse_args(args)
Then in your main function you should just call it with:
parser = parse_args(sys.argv[1:])
(where the first element of sys.argv that represents the script name is removed to not send it as an additional switch during CLI operation.)
In your tests, you can then call...
How to avoid explicit 'self' in Python?
...s leads to useful properties, such as: you can't add members which accidentally shadow non-members and thereby break code.
One extreme example: you can write a class without any knowledge of what base classes it might have, and always know whether you are accessing a member or not:
class A(some_fu...