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What is the recommended way to use Vim folding for Python code
...an crunch a document down the way you want it and can serve as a kind of a table of contents. I have this in my vimrc to flip between the two when I'm viewing someone elses code.
#Toggle fold methods \fo
let g:FoldMethod = 0
map <leader>fo :call ToggleFold()<cr>
fun! ToggleFold()
i...
Convert Pandas column containing NaNs to dtype `int`
...
My use case is munging data prior to loading into a DB table:
df[col] = df[col].fillna(-1)
df[col] = df[col].astype(int)
df[col] = df[col].astype(str)
df[col] = df[col].replace('-1', np.nan)
Remove NaNs, convert to int, convert to str and then reinsert NANs.
It's not pretty b...
Run a PostgreSQL .sql file using command line arguments
...d to run these inserts on my PostgreSQL database in order to add them to a table. The files are that large that it is impossible to open them and copy the INSERT statements into an editor window and run them there. I found on the Internet that you can use the following by navigating to the bin folde...
How to remove an item from an array in AngularJS scope?
...I found out the reason... I use a chunk method to create two columns in my table by watching my $scope.items. Sorry!
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How can I connect to MySQL in Python 3 on Windows?
...like mysqlclient is in debian testing as python3-mysqldb, but it's not in stable. So it will be in the next version.
– Collin Anderson
Mar 31 '17 at 15:57
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Memcached下一站：HandlerSocket！ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...SQL的能力了！
实战
首先创建一个测试用的表：
CREATE TABLE IF NOT EXISTS `test`.`t` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`a` varchar(10) NOT NULL,
`b` varchar(10) NOT NULL,
PRIMARY KEY (`id`),
KEY `a_b` (`a`,`b`)
) ENGINE=InnoDB;
注：理论上Hand...
Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
...rs can't be represented more simply with a range: !"^_`[].
Use an ACSII table to find ranges for character classes.
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How to run `rails generate scaffold` when the model already exists?
... does generate the view layer but it doesn't include the model attributes (table columns) and you have to add those by hand. Anybody know of a fix for this? I am on Rails 3.2.8.
– aaronbartell
Dec 3 '12 at 22:10
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What does auto do in margin:0 auto?
...e replacement for the "center" tag. It comes in handy when you need broken tables and non-working centering for blocks and text.
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剖析程序的内存布局 - C/C++ - 清泛网 - 专注C/C++及内核技术
...总是一个4GB的内存地址块。这些虚拟地址通过页表（page table）映射到物理内存，页表由操作系统维护并被处理器引用。每一个进程拥有一套属于它自己的页表，但是还有一个隐情。只要虚拟地址被使能，那么它就会作用于这台...