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MySql安装配置 - 爬虫/数据库 - 清泛IT社区，为创新赋能！
...ost' IDENTIFIED BY '123' WITH GRANT OPTION;
（注：%用于其他主机连接，localhost用于本机连接）
Dealing with float precision in Javascript [duplicate]
...of significant digits, like this:
(Math.floor(y/x) * x).toFixed(2)
Convert all your numbers to integers
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How to check the version before installing a package using apt-get?
I'm thinking to install hylafax+ version 5.5.4 which was release last month on my Debian PC.
10 Answers
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Java Reflection: How to get the name of a variable?
... answered Mar 19 '12 at 20:27
error_null_pointererror_null_pointer
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Static link of shared library function in gcc
...th,. so that ld can find your library in the local directory.)
The actual error you receive is:
/usr/bin/ld: attempted static link of dynamic object `libnamespec.so'
collect2: error: ld returned 1 exit status
Hope that helps.
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Python function attributes - uses and abuses [closed]
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I typically use function attributes as storage for annotations. Suppose I want to write, in the style of C# (indicating that a certain method should be part of the web service interface)
class Foo(WebService):
@webmethod
de...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...保存着传输的数据本身，还要预留一部分空间用来保存TCP连接本身相关的信息，换句话说，并不是所有空间都会被用来保存数据，相应额外开销的具体计算方法如下：
Buffer / 2^tcp_adv_win_scale
依照Linux内核版本的不同，net.ipv4....
How can I quickly sum all numbers in a file?
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For a Perl one-liner, it's basically the same thing as the awk solution in Ayman Hourieh's answer:
% perl -nle '$sum += $_ } END { print $sum'
If you're curious what Perl one-liners do, you can deparse them:
% perl -MO=Deparse -nle '$sum += $_ } END ...
Better way to get type of a Javascript variable?
...[object Array]' : 'array',
'[object Date]' : 'date',
'[object Error]' : 'error'
},
TOSTRING = Object.prototype.toString;
function type(o) {
return TYPES[typeof o] || TYPES[TOSTRING.call(o)] || (o ? 'object' : 'null');
};
This captures many of the primitives provided by javascri...
What is an xs:NCName type and when should it be used?
...s, then they are NCNames.
xs:string puts no restrictions on your names at all, but xs:NCName basically disallows ":" to appear in the string.
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