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Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...种高级语言，在C源程序中，不必为堆栈段、数据段和代码段的定义而担心，编译器会把程序中的字符串和语句代码分别放到它们该去的地方，程序开始执行的时候也会自己找到main()函数。而汇编是低级语言，必须为所有的东西...
How to validate an Email in PHP?
...eturn $email;
else
{
$pattern = '/^(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){255,})(?!(?:(?:\\x22?\\x5C[\\x00-\\x7E]\\x22?)|(?:\\x22?[^\\x5C\\x22]\\x22?)){65,}@)(?:(?:[\\x21\\x23-\\x27\\x2A\\x2B\\x2D\\x2F-\\x39\\x3D\\x3F\\x5E-\\x7E]+)|(?:\\x2...
Convert floats to ints in Pandas?
...
229
To modify the float output do this:
df= pd.DataFrame(range(5), columns=['a'])
df.a = df.a.ast...
pandas DataFrame: replace nan values with average of columns
...12343 NaN
7 -0.887858 1.033826 NaN
8 1.948430 1.025011 -2.982224
9 0.019698 -0.795876 -0.046431
In [28]: df.mean()
Out[28]:
A -0.151121
B -0.231291
C -0.530307
dtype: float64
In [29]: df.fillna(df.mean())
Out[29]:
A B C
0 -0.166919 0.979728 -0.632...
Remove border radius from Select tag in bootstrap 3
...r.
– Conrad Warhol
Jul 29 '16 at 21:22
2
This is definitely the best answer. I've searched for a ...
How to validate an email address in PHP
...pecs, but I have to warn you it is not an easy read by any stretch:
rfc5322
rfc5321
rfc3696
rfc6531 (allows unicode characters, although many clients / servers don't accept it)
Note that filter_var() is as already stated only available as of PHP 5.2. In case you want it to work with earlier vers...
Getting key with maximum value in dictionary?
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edited Feb 22 '18 at 17:51
Priyanka Chaudhary
63044 silver badges1111 bronze badges
answe...
Determine the data types of a data frame's columns
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220
Your best bet to start is to use ?str(). To explore some examples, let's make some data:
s...
How does one make a Zip bomb?
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edited Sep 22 '09 at 12:28
answered Sep 22 '09 at 12:21
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Is there a way to use SVG as content in a pseudo element :before or :after
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DerZyklopDerZyklop
2,44622 gold badges1414 silver badges2323 bronze badges
...