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MySQL, better to insert NULL or empty string?
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By using NULL you can distinguish between "put no data" and "put empty data".
Some more differe...
getting date format m-d-Y H:i:s.u from milliseconds
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How can I use Python to get the system hostname?
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Deep copy of a dict in python
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d2 = copy.deepcopy(d)
Python 2 or 3:
Python 3.2 (r32:88445, Feb 20 2011, 21:30:00) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import copy
>>> my_dict = {'a': [1, 2, 3], 'b': [4, 5, 6]}
>>> my_copy =...
How to fallback to local stylesheet (not script) if CDN fails
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PHP Pass by reference in foreach [duplicate]
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Because on the second loop, $v is still a reference to the last array item, so it's overwritte...
Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术
...的头文件.所有的asio类可以简单的通过include "...目录：
1. 同步Timer
2. 异步Timer
3. 回调函数的参数
4. 成员函数作为回调函数
5. 多线程回调同步
6. TCP客户端:对准时间
7. TCP同步时间服务器
1. 同步Timer
本章介绍asio如何在定...
How do I list one filename per output line in Linux?
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Use the -1 option (note this is a "one" digit, not a lowercase letter "L"), like this:
ls -1a
First, though, make sure your ls supports -1. GNU coreutils (installed on standard Linux systems) and Solaris do; but if in doubt, use...
How to check if mysql database exists
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