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How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?
... Ladislav MrnkaLadislav Mrnka
345k5656 gold badges638638 silver badges653653 bronze badges
...
get list of pandas dataframe columns based on data type
...u can use groupby:
>>> df = pd.DataFrame([[1, 2.3456, 'c', 'd', 78]], columns=list("ABCDE"))
>>> df
A B C D E
0 1 2.3456 c d 78
[1 rows x 5 columns]
>>> df.dtypes
A int64
B float64
C object
D object
E int64
dtype: object
>>>...
Is the order of iterating through std::map known (and guaranteed by the standard)?
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180
Yes, that's guaranteed. Moreover, *begin() gives you the smallest and *rbegin() the largest ele...
How to shift a column in Pandas DataFrame
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In [18]: a
Out[18]:
x1 x2
0 0 5
1 1 6
2 2 7
3 3 8
4 4 9
In [19]: a.x2 = a.x2.shift(1)
In [20]: a
Out[20]:
x1 x2
0 0 NaN
1 1 5
2 2 6
3 3 7
4 4 8
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How to read keyboard-input?
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edited Apr 28 '18 at 12:35
dopexxx
1,2071313 silver badges2020 bronze badges
answered Mar ...
Disable cache for some images
...<img src="image.png" />
Would become
<img src="image.png?dummy=8484744" />
Or
<img src="image.png?dummy=371662" />
From the point of view of the web-server the same file is accessed, but from the point of view of the browser no caching can be performed.
The random number g...
Find the version of an installed npm package
...ed to it).
– jakub.g
May 16 '16 at 18:35
4
...
How do you create an asynchronous method in C#?
...t I was looking for.
– Ricibob
Aug 28 '13 at 12:48
1
Stephen, in the for loop, is the next iterat...
Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...
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