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Checking oracle sid and database name
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I presume SELECT user FROM dual; should give you the current user
and SELECT sys_context('usere...
maxlength ignored for input type=“number” in Chrome
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How do I use Maven through a proxy?
...ings ([maven install]/conf/settings.xml), or user settings (${user.home}/.m2/settings.xml) is configured correctly. It is better to do this in your user settings to avoid storing the password in plain text in a public location.
Maven 2.1 introduced password encryption, but I've not got round to che...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
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TIME_WAIT 814
CLOSE_WAIT 1
FIN_WAIT1 1
ESTABLISHED 634
SYN_RECV 2
LAST_ACK 1
常用的三个状态是：ESTABLISHED 表示正在通信，TIME_WAIT 表示主动关闭，CLOSE_WAIT 表示被动关闭。
具体每种状态什么意思，其实无需多说，看看下面这种图就明白...
What is getattr() exactly and how do I use it?
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getattr(object, 'x') is completely equivalent to object.x.
There are only two cases where get...
Applying function with multiple arguments to create a new pandas column
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>>> import numpy as np
>>> df = pd.DataFrame({"A": [10,20,30], "B": [20, 30, 10]})
>>> df['new_column'] = np.multiply(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary functi...
Revert the `--no-site-packages` option with virtualenv
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Try removing (or renaming) the file no-global-site-packages.txt in your Lib folder under your vi...
Are “elseif” and “else if” completely synonymous?
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python multithreading wait till all threads finished
... asked in a similar context but I was unable to find an answer after about 20 minutes of searching, so I will ask.
8 Answer...
When does invoking a member function on a null instance result in undefined behavior?
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