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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...ed
to this value (at byte level).
// the following magic values are done by the OS, not the C runtime:
0xAB (Allocated Block?) Memory allocated by LocalAlloc().
0xBAADF00D Bad Food Memory allocated by LocalAlloc() with LMEM_FIXED,but
no...
Is there any particular difference between intval and casting to int - `(int) X`?
...1.7920589447 ms"
Looks like 7.1 optimized intval, and '1' + 0 is now the winner of this speed contest :) I'd still keep using intval anyway
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How can I link to a specific glibc version?
When I compile something on my Ubuntu Lucid 10.04 PC it gets linked against glibc. Lucid uses 2.11 of glibc. When I run this binary on another PC with an older glibc, the command fails saying there's no glibc 2.11...
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微软正式推送Win10，不满意或者不习惯可以回滚至旧版 - 资讯 - 清泛网 - 专...
微软正式推送Win10，不满意或者不习惯可以回滚至旧版今天无疑是微软新款操作系统Win10的大日子，被视作继Win7之后又一个能够带微软重回巅峰的系统作品，Win10推送全面开启，Win7、Win8用户从今日零点起就可以免费升级到Win10，...
How to manage local vs production settings in Django?
...ttings that Harper Shelby posted. Obviously depending on the environment (win/linux/etc.) the code might need to be tweaked a bit.
I was in the past using the "if DEBUG" but I found that occasionally I needed to do testing with DEUBG set to False. What I really wanted to distinguish if the enviro...
How do I watch a file for changes?
...ady looked at the documentation available on http://timgolden.me.uk/python/win32_how_do_i/watch_directory_for_changes.html? If you only need it to work under Windows the 2nd example seems to be exactly what you want (if you exchange the path of the directory with the one of the file you want to watc...
How to initialize private static members in C++?
... one of our .cpp files? It will compile fine and we will have no way of knowing which one wins until we run the program.
Never put executed code into a header for the same reason that you never #include a .cpp file.
include guards (which I agree you should always use) protect you from something di...
Most common C# bitwise operations on enums
For the life of me, I can't remember how to set, delete, toggle or test a bit in a bitfield. Either I'm unsure or I mix them up because I rarely need these. So a "bit-cheat-sheet" would be nice to have.
...
Why do we need C Unions?
...s and floats:
union
{
int i;
float f;
} u;
// Convert floating-point bits to integer:
u.f = 3.14159f;
printf("As integer: %08x\n", u.i);
Although this is technically undefined behavior according to the C standard (you're only supposed to read the field which was most recently written), it wi...
How is the default max Java heap size determined?
...ors
2 or more Gbytes of physical memory
with the exception of 32 bit platforms
running a version of the Windows
operating system. On all other
platforms the default values are the
same as the default values for version
1.4.2.
In the J2SE platform version 1.4.2 by
default ...