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Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ervers”个子进程后，为了满足MinSpareServers设置的需要创建一个进程，等待一秒钟，继续创建两个，再等待一秒钟，继续创建四个……如此按指数级增加创建的进程数，最多达到每秒32个，直到满足MinSpareServers设置的值为止。这就...
VBoxManage: error: Failed to create the host-only adapter
... should now be able to run vagrant up or vagrant reload and have your new host configured.
As mentioned in this answer, recent versions of macOS can block VirtualBox.
Solution:
Go to System Preferences > Security & Privacy Then hit the "Allow" button to let Oracle (VirtualBox) load.
...
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
...lete三个键，然后点击“Processes(进程)”选项卡，可以看到一个对话框，在这里可以看到目前正在运行的所有进程。如果要为一个程序分配更多的进程时间，如3D Studio Max，只需右键点击这个进程，再把鼠标指针向下移动到“Set Prio...
How to repeat a string a variable number of times in C++?
...
std::string(5, '.')
This is a contrived example of how you might use an ostringstream to repeat a string n times:
#include <sstream>
std::string repeat(int n) {
std::ostringstream os;
for(int i = 0; i < n; i++)
os << "repeat";
return os.str();
}
Depending on...
Can I redirect the stdout in python into some sort of string buffer?
...start
out = sys.stdout.read() # read output
# restore stdout
sys.stdout.close()
sys.stdout = old_stdout
This solution works for Python 2 >= 2.6 and Python 3.
Please note that our new sys.stdout.write() only accepts unicode strings and sys.stdout.buffer.write() only accepts byte strings.
This ...
Why does Android use Java? [closed]
...o Java was known in the industry
the speed difference is not an issue for most applications; if it was you should code in low-level language
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How do I find the location of Python module sources?
...swer to indicate that datetime.__file__ points to a .so on Linux & Mac OS X (though on Windows the datetime module object has no file attribute), I'll accept your answer.
– Daryl Spitzer
Nov 6 '08 at 19:06
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How do I serialize an object and save it to a file in Android?
...
Saving (w/o exception handling code):
FileOutputStream fos = context.openFileOutput(fileName, Context.MODE_PRIVATE);
ObjectOutputStream os = new ObjectOutputStream(fos);
os.writeObject(this);
os.close();
fos.close();
Loading (w/o exception handling code):
FileInputStream fis =...
Check if string ends with one of the strings from a list
...m the file and see if it is in the set of extensions:
>>> import os
>>> extensions = set(['.mp3','.avi'])
>>> file_name = 'test.mp3'
>>> extension = os.path.splitext(file_name)[1]
>>> extension in extensions
True
Using a set because time complexity for...
How do I view the type of a scala expression in IntelliJ
...2 '11 at 10:26
Sergey PassichenkoSergey Passichenko
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