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What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...y puny test cases, you are Stop at 0x0013f3: (106) Invalid instruction 0x00dd
printf crashes. "O_O"
gcc 4.4@x86_64-suse-linux
We like to think that:
..05 int has the size of pointers
but 'sizeof(int)==sizeof(void*)' is false.
..08 overshifting is okay
but '(1<<bits_per_int)==0' is false....
Timer function to provide time in nano seconds using C++
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83
What others have posted about running the function repeatedly in a loop is correct.
For Linux ...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ly from gcc-4.6.4 -Os (executes in 0.709 secs):
00000000004004d2 <_ZL3addRKiS0_.isra.0>:
4004d2: 8d 04 37 lea eax,[rdi+rsi*1]
4004d5: c3 ret
00000000004004d6 <_ZL4workii>:
4004d6: 41 55 push r13
4004d8...
Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
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83
TL;DR
a) the method/function only reads the array argument => implicit (internal) reference...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...六进制代码为nnnn的字符
\cN
ASCII控制字符。比如\cC代表Ctrl+C
\A
字符串开头(类似^，但不受处理多行选项的影响)
\Z
字符串结尾或行尾(不受处理多行选项的影响)
\z
字符串结尾(类似$，但不受处理多行...
What is state-of-the-art for text rendering in OpenGL as of version 4.1? [closed]
...ge). But even if you magnify far beyond 16x, the result still looks quite acceptable. Long straight lines will eventually become a bit wiggly, but there will be no typical "blocky" sampling artefacts.
You can use a geometry shader for generating the quads out of points (reduce bus bandwidth), but h...
Maintain the aspect ratio of a div with CSS
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Web_DesignerWeb_Designer
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How do function pointers in C work?
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Yuval AdamYuval Adam
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Code Golf: Lasers
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Golfscript - 83 chars (mashup of mine and strager's)
The newline is just here for wrapping
:|'v^><'.{|?}%{)}?:$@=?{.[10|?).~)1-1]=$+
:$|=' \/x'?\[.\2^.1^'true''false']=.4/!}do
Golfscript - 107 chars
The newline is just there fo...
How can I get a count of the total number of digits in a number?
... This does not work for 0. Math.Floor(Math.Log10(0) + 1) = -2147483648 (negative infiinity + 1). See docs.microsoft.com/en-us/dotnet/api/… documentation.
– Idan P
Apr 14 at 8:48
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