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One DbContext per web request… why?

...g how to set up Entity Framework's DbContext so that only one is created and used per HTTP web request using various DI frameworks. ...
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What's the difference between an element and a node in XML?

I'm working in Java with XML and I'm wondering; what's the difference between an element and a node? 13 Answers ...
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How do I run a Python program in the Command Prompt in Windows 7?

I'm trying to figure out how to run Python programs with the Command Prompt on Windows 7. (I should have figured this out by now...) ...
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What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?

... works. Not to mention you often get "1.5 URLs" (i.e. the old URL remains, and just has the new part added to it (i.e. photo.php?id=... twice, but with different ids). Not to mention that "#!" is also added to facebook-mail URLs, which probably aren't (and shouldn't be) indexable. In any case I find...
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Why is there an “Authorization Code” flow in OAuth2 when “Implicit” flow works so well?

...n-HTTPS redirect URI because not all developers have an SSL enabled server and if they do it's not always properly configured (non-self signed, trusted SSL certificates, synchronised server clock...). You don't want hackers to be able to steal access/refresh tokens by intercepting requests. Detail...
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Use of *args and **kwargs [duplicate]

So I have difficulty with the concept of *args and **kwargs . 11 Answers 11 ...
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What does “|=” mean? (pipe equal operator)

I tried searching using Google Search and Stack Overflow, but it didn't show up any results. I have seen this in opensource library code: ...
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What exactly are DLL files, and how do they work?

...are so much like an EXE that the file format itself is the same. Both EXE and DLLs are based on the Portable Executable (PE) file format. DLLs can also contain COM components and .NET libraries. What does a DLL contain? A DLL contains functions, classes, variables, UIs and resources (such as ico...
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How to implement classic sorting algorithms in modern C++?

The std::sort algorithm (and its cousins std::partial_sort and std::nth_element ) from the C++ Standard Library is in most implementations a complicated and hybrid amalgamation of more elementary sorting algorithms , such as selection sort, insertion sort, quick sort, merge sort, or heap sort....
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Understanding reference counting with Cocoa and Objective-C

I'm just beginning to have a look at Objective-C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept, but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it, but I'm just not o...