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Implement touch using Python?
touch is a Unix utility that sets the modification and access times of files to the current time of day. If the file doesn't exist, it is created with default permissions.
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List columns with indexes in PostgreSQL
I would like to get the columns that an index is on in PostgreSQL.
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Numpy `logical_or` for more than two arguments
Numpy's logical_or function takes no more than two arrays to compare. How can I find the union of more than two arrays? (The same question could be asked with regard to Numpy's logical_and and obtaining the intersection of more than two arrays.)
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Why can't C++ be parsed with a LR(1) parser?
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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
...章就是数字签名, 那么”敏捷的水”就是颁发证书的机构CA(Certificate Authority)，也就是证书授权中心。
CA CA 是“Certificate Authority”的缩写，也叫“证书授权中心”。 它是负责管理和签发证书的第三方机构，就好比例子里面的“敏...
Linux下安装项目管理工具Redmine - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...ub/ruby/1.8/ruby-1.8.7-p174.tar.gz
# tar zxvf ruby-1.8.7-p174.tar.gz
# cd ruby-1.8.7-p174
# ./configure --prefix=/usr/local/ruby
# make && make install
设置Ruby环境变量
# cd ~
# vi .bash_profile
添加下面一行
export PATH=$PATH:/u...
What is the purpose of the “final” keyword in C++11 for functions?
What is the purpose of the final keyword in C++11 for functions? I understand it prevents function overriding by derived classes, but if this is the case, then isn't it enough to declare as non-virtual your final functions? Is there another thing I'm missing here?
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Sublime Text from Command Line
...to know how to open rb files in it from the terminal. I saw What is the command to make Sublime Text my core editor? and I see that I can make Sublime my core editor, but I want to be able to type
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Why is the use of tuples in C++ not more common?
Why does nobody seem to use tuples in C++, either the Boost Tuple Library or the standard library for TR1? I have read a lot of C++ code, and very rarely do I see the use of tuples, but I often see lots of places where tuples would solve many problems (usually returning multiple values from functi...
powershell - extract file name and extension
I need to extract file name and extension from e.g. my.file.xlsx. I don't know the name of file or extension and there may be more dots in the name, so I need to search the string from the right and when I find first dot (or last from the left), extract the part on the right side and the part on the...