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pandas GroupBy columns with NaN (missing) values
...n the Missing Data section of the docs:
NA groups in GroupBy are automatically excluded. This behavior is consistent with R, for example.
One workaround is to use a placeholder before doing the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fil...
Get the first element of each tuple in a list in Python [duplicate]
...for x in rows]
– bgschiller
Jan 22 '15 at 15:53
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How can we programmatically detect which iOS version is device running on? [duplicate]
...uld be at the top.
– Josh Brown
Jan 15 '14 at 19:31
1
Kinda bothers me that there MIGHT be a 6.2 ...
STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...定义一个结构体来试试：[cpp]view plaincopystructa{char*pName;intm_a;} 引言
STL的map容器中，key的类型是不是随意的呢？
实践
编写测试代码
定义一个结构体来试试：
struct a
{
char* pName;
int m_a;
};
...
map<a, int> mp;
a ...
Manually map column names with class properties
...rson>(sql).ToList();
return person;
}
Dapper has no facility that allows you to specify a Column Attribute, I am not against adding support for it, providing we do not pull in the dependency.
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How can I extract the folder path from file path in Python?
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answered Jun 12 '13 at 4:15
SethMMortonSethMMorton
32.4k1010 gold badges5353 silver badges7171 bronze badges
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How to find out where a function is defined?
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@EHerman I don't think you can find callers of a function with reflection. If you could it probably wouldn't work well for this because PHP files tend to be included on demand, and so you would likely not have all the code loaded which does call the function.
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Auto code completion on Eclipse
I want Eclipse to automatically suggest to me all possible options, while I'm writing some variable/class name or keyword, like in Flash Develop or Visual Studio.
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Auto line-wrapping in SVG text
...h, it needs to use one of the featurestrings defined in the svg spec. The fallback will never be used in your example. See w3.org/TR/SVG11/feature.html and w3.org/TR/SVG11/struct.html#SwitchElement.
– Erik Dahlström
Feb 14 '11 at 13:43
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Pass ruby script file to rails console
...ossible?
– Dan Barron
Jan 21 '14 at 15:33
1
@DanBarron you can put in a debugger or binding.pry
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