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Why is address zero used for the null pointer?
...memory address zero was special and had hardware protection against access from running software (in some cases it was the start of the reset vector, and modifying it could prevent the CPU from resetting or starting up). Programmers used this hardware protection as a form of error detection in thei...
Difference between modes a, a+, w, w+, and r+ in built-in open function?
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For posterity: truncate means to overwrite from the beginning.
– Minh Tran
Jun 12 '18 at 21:05
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Fade/dissolve when changing UIImageView's image
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Edit: there is a better solution from @algal below.
Another way to do this is by using predefined CAAnimation transitions:
CATransition *transition = [CATransition animation];
transition.duration = 0.25;
transition.timingFunction = [CAMediaTimingFunction f...
Why does the 260 character path length limit exist in Windows?
...null] = 260. One could assume that 256 is a reasonable fixed string length from the DOS days. And going back to the DOS APIs we realize that the system tracked the current path per drive, and we have 26 (32 with symbols) maximum drives (and current directories).
The INT 0x21 AH=0x47 says “This fu...
SQL Server, convert a named instance to default instance?
...nstance to default - my reason was to access it with just the machine name from various applications.
If you want to access a named instance from any connection string without using the instance name, and using only the server name and/or IP address, then you can do the following:
Open SQL Server...
Why doesn't the JVM cache JIT compiled code?
The canonical JVM implementation from Sun applies some pretty sophisticated optimization to bytecode to obtain near-native execution speeds after the code has been run a few times.
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How should I unit test threaded code?
...I'm working on a project that is inherently multithreaded. Events come in from the operating system and I have to process them concurrently.
The simplest way to deal with testing complex, multithreaded application code is this: If its too complex to test, you're doing it wrong. If you have a s...
Creating a singleton in Python
...lass itself is a a function, not a class, so you cannot call class methods from it."
Python 2 and 3 Compatible Version
Writing something that works in both Python2 and 3 requires using a slightly more complicated scheme. Since metaclasses are usually subclasses of type type, it's possible to use one...
Why isn't std::initializer_list a language built-in?
...o generate the object, the syntax is context-sensitive curly braces. Aside from that it's the same as type_info. Personally I don't think the absence of a keyword makes it "more hacky". Slightly more surprising, perhaps, but remember that the objective was to allow the same braced-initializer syntax...
Testing Private method using mockito
...method with Powermock. Where, I can pass some input and expect some output from the method and then verify the output?
– Rito
Oct 27 '17 at 20:42
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