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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...or, because in concurrent transactional access one has to be prepared to restart transactions anyway. If errors happen more often than necessary it might reduce performance, but it is still correct.
– Jan Hudec
Jun 4 '14 at 14:39
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How to find if a native DLL file is compiled as x64 or x86?
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// seek to, and read, e_lfanew then advance the stream to there (start of NT header)
stream.Seek(0x3A, System.IO.SeekOrigin.Current);
stream.Seek(reader.ReadUInt32(), System.IO.SeekOrigin.Begin);
// Ensure the NT header is valid by checking the "PE\0\0" signature
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Django Cookies, how can I set them?
...', {})
If you keep visiting the page over and over, you'll see the value start incrementing up from 1 until you clear your cookies, visit on a new browser, go incognito, or do anything else that sidesteps Django's Session ID cookie.
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How can I decompress a gzip stream with zlib?
...e different gzip header unless you tell it so. Although this is documented starting in version 1.2.1 of the zlib.h header file, it is not in the zlib manual. From the header file:
windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip...
How to implement the factory method pattern in C++ correctly
...aged languages. If you want the convenience of automatic memory management start programming in Java or C# but don't put that mess into C/C++.
– luke1985
Apr 19 '14 at 21:07
47
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What is the difference between statically typed and dynamically typed languages?
...etc.). From another perspective, statically typed languages have more of a start-up cost: makes you usually write more code, harder code. But that pays later off.
The good thing is both sides are borrowing features from the other side. Typed languages are incorporating more dynamic features, e.g.,...
Reading/writing an INI file
... I used this approach for awhile, but security enhancements starting in Win7 have pretty much killed this for me. You can still use this approach, but you will have store the .ini in ProgramData and have your app read / write there.
– Jess
Sep 4...
Reading binary file and looping over each byte
...e slice notation. For example, mm[i:i+len] returns len bytes from the file starting at position i. The context manager protocol is not supported before Python 3.2; you need to call mm.close() explicitly in this case. Iterating over each byte using mmap consumes more memory than file.read(1), but mma...
How does facebook, gmail send the real time notification?
...t's a fair point, however this answer was written in 2009, before facebook started using hiphop. At the time facebook was still a very large-scaled system using php on it's own.
– Alistair Evans
Oct 16 '11 at 9:35
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How can I use Spring Security without sessions?
...ks for my use case. I don't actually require that Spring Security doesn't start a session (because I use session in other parts of the application), just that it doesn't "remember" authentication in the session at all (it should be re-checked every request).
To begin with, I wasn't able to figure ...