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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...语法有两种形式
2.2. 命令选项
3. 模式和操作
3.1. 模式
3.2. 操作
4. awk的环境变量
5. awk运算符
6. 记录和域
6.1. 记录
6.2. 域
6.3. 域分隔符
...
Getting the path of the home directory in C#?
...MEPATH%. Reading environment variables is actually very portable to do (across Unix and Windows), so I'm not sure why the poster wanted to not do it.
Edited to add: For crossplatform (Windows/Unix) C#, I'd read $HOME on Unix and OSX and %HOMEDRIVE%%HOMEPATH% on Windows.
...
Quick and easy file dialog in Python?
...w I'm prompting the user for the file to parse using raw_input which is most unfriendly, especially because the user can't copy/paste the path. I would like a quick and easy way to present a file selection dialog to the user, they can select the file, and then it's loaded to the database. (In my...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...时，LINGO都会提示为参数inflation_rate输入一个值。在WINDOWS操作系统下，将会接收到一个类似下面的对话框：
直接输入一个值再点击OK按钮，LINGO就会把输入的值指定给inflation_rate，然后继续求解模型。
除了参数之外，也可以...
How do you stop MySQL on a Mac OS install?
...starting from the MySQL System Preferences panel.
– Ross Henderson
Apr 16 '11 at 1:00
4
In my cas...
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.
...
VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...拟机迁移到其他的LUN空间上
然后在存储上做扩容和收缩操作
完成操作之后 问题来了
ESX1 ESX2可以在设备中可以认到LUN 60 LUN80 容量显示正确，但不能正确识别文件格式。在ESX1的数据储存中认到LUN60 LUN80的准确容量...
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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