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内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...每一块数据都被加上一个标签。不定期的，所有标签都被设置为 0，收集器从“基本”的元素开始遍历数据。当它遇到内存时，就将标签标记为 1。最后没有被标记为 1 的所有内容都认为是垃圾，以后分配内存时会重新使用它们...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...Interval_Min），如果需要固定广播间隔，则需要将两个参数设置成一样。
之所以要这么设计，是为了防止在批量测试或者使用设备时，由于多个设备的同时广播，而形成数据风暴，防止设备之间的干扰。
扫描扫描类别主动扫描...
SSMS插件开发指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...DIN_NAME, TOOLWINDOW_GUID, ref myUserControlObject);
// 设置DTE对象
MyUserControl muc = myToolWindow.Object as MyUserControl;
muc.ApplicationObject = _applicationObject;
// SQL执行后事件
cmdEvent = _a...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...L
#/usr/local/mysql/bin/mysqladmin -u root password 123456 //设置MySQL密码
#cp support-files/my-medium.cnf /etc/my.cnf
#echo "/usr/local/mysql/bin/mysqld_safe &" >>/etc/rc.local
二、安装PCRE
PCRE是perl所用到...
Determine font color based on background color
... else
d = 255; // dark colors - white font
return Color.FromArgb(d, d, d);
}
This was tested for many various colorscales (rainbow, grayscale, heat, ice, and many others) and is the only "universal" method I found out.
Edit
Changed the formula of counting a to "perceptive luminance...
Adding a guideline to the editor in Visual Studio
...ltiple columns by listing more than one number after the color specifier:
RGB(230,230,230), 4, 80
Puts a white line at column 4 and column 80. This should be the value of a string value Guides in "Text Editor" key (see bellow).
Be sure to pick a line color that will be visisble on your backgroun...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...TIME_WAIT的时间。
net.ipv4.tcp_keepalive_*一系列参数，是用来设置服务器检测连接存活的相关配置。
关于keepalive的用途可以参考：http://hi.baidu.com/tantea/blog/item/580b9d0218f981793812bb7b.html
2.服务器保持了大量CLOSE_WAIT状态
休息一下，喘...
Named colors in matplotlib
... colors by hue, saturation, value and name.
by_hsv = sorted((tuple(mcolors.rgb_to_hsv(mcolors.to_rgba(color)[:3])), name)
for name, color in colors.items())
sorted_names = [name for hsv, name in by_hsv]
n = len(sorted_names)
ncols = 4
nrows = n // ncols
fig, ax = plt.subplots(figsi...
java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...个值,那么将会起用缓存清空策略,根据不同的场景合理的设置最大元素值往往可以一定程度上提高缓存的命中率.从而更有效的时候缓存.
(3) 清空策略
1 FIFO ，first in first out ，最先进入缓存得数据在缓存空间不够情况下(超出...
QLabel: set color of text and background
... I think it could be useful to anybody.
I step into the problem of setting RGBA colors (that is, RGB color with an Alpha value for transparency) for color display labels in my painting application.
As I came across the first answer, I was unable to set an RGBA color. I have also tried things like:
...