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Pointer arithmetic for void pointer in C
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Final conclusion: arithmetic on a void* is illegal in both C and C++.
GCC allows it as an extension, see Arithmetic on void- and Function-Pointers (note that this section is part of the "C Extensions" chapter of the manual). Clang and ICC likely allow void* arithmetic for the purpose...
Why use bzero over memset?
...ucts, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and not memset to initialize them. He never explained why, and I'm curious if there is a valid reason for this?
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Django : How can I see a list of urlpatterns?
...r settings like this:
INSTALLED_APPS = (
...
'django_extensions',
...
)
And then, run this command in your terminal
./manage.py show_urls
For more information you can check the documentation.
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Difference between map, applymap and apply methods in Pandas
...rame’s apply method does exactly this:
In [116]: frame = DataFrame(np.random.randn(4, 3), columns=list('bde'), index=['Utah', 'Ohio', 'Texas', 'Oregon'])
In [117]: frame
Out[117]:
b d e
Utah -0.029638 1.081563 1.280300
Ohio 0.647747 0.831136 -1.549481
Tex...
How to pass the password to su/sudo/ssh without overriding the TTY?
...nt their passwords in console input (the TTY) rather than stdin or the command line.
21 Answers
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How can you list the matches of Vim's search?
...
" put in your ~/.vimrc file
" START search related configs and helps
"
" ignore case when searching
set ignorecase
" search as characters are entered, as you type in more characters, the search is refined
set incsearch
" highlight matches, in normal mode try...
Calculating Pearson correlation and significance in Python
I am looking for a function that takes as input two lists, and returns the Pearson correlation , and the significance of the correlation.
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MAC下如何删除NTFS格式U盘的东西？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...除NTFS格式U盘的东西？mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只提供了读的权限给NTFS、FAT32给硬盘和U盘，我们99%使用的硬盘和U盘都是...mac上只提供了它自身磁盘格式（mac os 扩展日子）等的读写权限，只...
js/php判断终端类型：PC访问、手机访问、微信访问 - 更多技术 - 清泛网 - ...
... mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
android: u.indexOf('Android') > -1, //android终端
iPhone: u.indexOf('iPhone') > -1, //是否为iPhone
iPad: u.indexOf('iPad') > -1, //是否iPad
...
How to show the last queries executed on MySQL?
...method to editing .cnf files because:
you're not editing the my.cnf file and potentially permanently turning on logging
you're not fishing around the filesystem looking for the query log - or even worse, distracted by the need for the perfect destination. /var/log /var/data/log /opt /home/mysql_s...