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Android emulator and virtualbox cannot run at same time
... the Virtualbox emulator and unload its driver (vboxdrv) by running 'sudo /etc/init.d/vboxdrv stop'. Google suggests this "solution" on its Android Emulator page in the section about Linux.
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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
...的处理方法混为一谈,以为优化系统内核参数就可以解决问题,其实是不恰当的,优化系统内核参 数解决TIME_WAIT可能很容易,但是应对CLOSE_WAIT的情况还是需要从程序本身出发。现在来分别说说这两种情况的处理方法:
1.服务...
How to measure time taken between lines of code in python?
...g about time.time() is that it is affected by time sunchronization ntpdate etc. I would say time.clock() would be the only reliable alternative because of this
– www.jensolsson.se
Jul 26 '16 at 6:58
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Read user input inside a loop
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read input
echo $input;
done
Unit test:
for line in $(cat /etc/passwd); do
read input
echo $input;
echo "[$line]"
done
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What are bitwise shift (bit-shift) operators and how do they work?
...een attempting to learn C in my spare time, and other languages (C#, Java, etc.) have the same concept (and often the same operators) ...
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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...它与以前的版本不兼容,但允许使用 SSL/TLS 连接以满足更高的安全要求。
在 MQTT 客户端连接到 MQTT 服务器之前,必须先设置连接参数,然后使用 Connect 方法创建与服务器的连接。ConnectionStateChanged 事件报告连接状态的任...
What is the difference between task and thread?
...it takes a long time to compute, or it might that it takes a long time to fetch. Only in the former case would you use a Thread to run a Task. (In .NET, threads are freaking expensive, so you generally want to avoid them as much as possible and really only use them if you want to run multiple heavy ...
Sleeping in a batch file
...sys.argv[1]))
It will allow sub-second pauses (for example, 1.5 sec, 0.1, etc.), should you have such a need. If you want to call it as sleep rather than sleep.py, then you can add the .PY extension to your PATHEXT environment variable. On Windows XP, you can edit it in:
My Computer → Properties...
硬盘最神秘的功能,万万想不到 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
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这种办法可以很轻松的确定其重心~
用圆规划一个圈,定位打孔~
然后在盒盒侧边给它扎上几针。
居然把磁盘拆了下来!3.5寸的大家伙,看上去像电磨的磨片~
还用上了电钻,要干什么呢?
看这个洞,剪得圆不~
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[工程源码实例] C++ ADO 读写Excel源码及注意点 - C/C++ - 清泛网 - 专注C/C++及内核技术
...貌似找不到驱动,有解决的烦请评论告知下,谢谢。
3、定位单元格可以用整数索引,也可以用字符串列名(第一行的文字)。
4、SELECT * FROM [中文Sheet名$] 中文Sheet名后要加"$"。
5、单元格为空的话,v.vt 值为 VT_NULL。|1454|1455C...