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How to structure a express.js application?

... it. Of those, I think Twitter's matador is structured pretty well. We actually used a very similar approach to how they load up parts of the app. derby.js also looks extremely interesting. It's akin to meteor without all of the hype and actually gives credit where credit is due (notably, node and e...
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Standard alternative to GCC's ##__VA_ARGS__ trick?

...preprocessor features; you must use some extension to the language. clang and icc have adopted this GCC extension, but MSVC has not. Back in 2001 I wrote up the GCC extension for standardization (and the related extension that lets you use a name other than __VA_ARGS__ for the rest-parameter) in ...
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Difference between abstract class and interface in Python

... @L.DeLeo - are you sure your notion of has-a vs. is-a is correct? I generally view the distinction as has-a = member variable vs. is-a = inheritance (parent class or interface). Think Comparable or List in Java; those are is-a relationships, regardless of whether they're interfaces or abstract cl...
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What is the difference between user and kernel modes in operating systems?

... CPU instruction and reference any memory address. Kernel mode is generally reserved for the lowest-level, most trusted functions of the operating system. Crashes in kernel mode are catastrophic; they will halt the entire PC. User Mode In User mode, the executing code has no abili...
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How to avoid reverse engineering of an APK file?

...cker is able to change it in any way she or he finds it feasible. You basically can't protect your application from being modified. And any protection you put in there can be disabled/removed.  2. How can I protect all the app's resources, assets and source code so that hackers can't hack the A...
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How to pass arguments to a Button command in Tkinter?

... I personally prefer to use lambdas in such a scenario, because imo it's clearer and simpler and also doesn't force you to write lots of wrapper methods if you don't have control over the called method, but that's certainly a matter o...
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Equivalent to 'app.config' for a library (DLL)

... You can have separate configuration file, but you'll have to read it "manually", the ConfigurationManager.AppSettings["key"] will read only the config of the running assembly. Assuming you're using Visual Studio as your IDE, you can right click the desired project → Add → New item → Applicat...
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Counting the Number of keywords in a dictionary in python

... the len() function. > a = {'foo':42, 'bar':69} > len(a) 2 To get all the distinct words (i.e. the keys), use the .keys() method. > list(a.keys()) ['foo', 'bar'] share | improve this a...
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How to normalize an array in NumPy?

I would like to have the norm of one NumPy array. More specifically, I am looking for an equivalent version of this function ...
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Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?

... of power functions (and others). C++11 [c.math] /11 states, after listing all the float/double/long double overloads (my emphasis, and paraphrased): Moreover, there shall be additional overloads sufficient to ensure that, if any argument corresponding to a double parameter has type double or an...