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“register” keyword in C?
... a processor register if possible.
Most modern compilers do that automatically, and are better at picking them than us humans.
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How is the fork/join framework better than a thread pool?
...00 to someone else." This goes on until the big task is broken down into small packets of 10 units each. These will be executed by the available workers. But if one packet is a kind of poison pill and takes considerably longer than other packets -- bad luck, the divide phase is over.
The only remai...
What is the difference between quiet NaN and signaling NaN?
...unit (FPU) or library if floating-point is implemented in software. A signalling NaN will produce a signal, usually in the form of exception from the FPU. Whether the exception is thrown depends on the state of the FPU.
C++11 adds a few language controls over the floating-point environment and pr...
Python pandas: fill a dataframe row by row
...you want to align the input (for example you then don't have to to specify all of the elements)
In [7]: df = pandas.DataFrame(columns=['a','b','c','d'], index=['x','y','z'])
In [8]: df.loc['y'] = pandas.Series({'a':1, 'b':5, 'c':2, 'd':3})
In [9]: df
Out[9]:
a b c d
x NaN NaN Na...
Echarts透明背景及兼容问题 - 用户反馈 - 清泛IT社区，为创新赋能！
用户反馈wxbit导入失败：高德地图，启动画面等导致。
Echart是自己导入及实现的，背景透明没有效果，最终WebViewPlus拓展解决了。
方法一:
var option={
backgroundColor:'rgba(128, 128, 128, 0.1)' //rgba设置透明度0.1
}
方法二:
va...
低效程序员的7个坏习惯 - 创意 - 清泛网 - 专注C/C++及内核技术
...le的Charles解释道，“低效的工程师会错误地表征用户体验问题为其他人的问题。”
遗憾的是，似乎很多软件工程师都持有这种态度，这也是为什么企业要寻求能够移情和了解他人问题的代码战士。 “雇主正在竭力寻找那些拥有...
提升速度：XP注册表与驱动优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件来提升Windows XP的运行速度!
注册表优化方案
1、启用CPU L2 Cahce
到注册表HKCU_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory Management下，新建Dword值:
SecondLevelDataCache，修改这个值为你的CPU的二级缓存的大小，填写的时候使用...
Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...interactively and in automatic mode. It has a ptrace()-based backend which allows its use on a Linux system without special privileges, as well as a far faster and more poweful backend which requires patching the kernel.
It is also possible to create a sandbox on Unix-like systems using chroot(1), ...
A fast method to round a double to a 32-bit int explained
... this:
and it can be seen as two 32-bit integers; now, the int taken in all the versions of your code (supposing it's a 32-bit int) is the one on the right in the figure, so what you are doing in the end is just taking the lowest 32 bits of mantissa.
Now, to the magic number; as you correctly ...
Difference between scaling horizontally and vertically for databases [closed]
...ses and scalability is one of them. What is the difference between horizontally and vertically scaling these databases?
10 ...