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How to group dataframe rows into list in pandas groupby?
...'A','A','B','B','B','C'], 'b':[1,2,5,5,4,6]})
df
Out[1]:
a b
0 A 1
1 A 2
2 B 5
3 B 5
4 B 4
5 C 6
In [2]: df.groupby('a')['b'].apply(list)
Out[2]:
a
A [1, 2]
B [5, 5, 4]
C [6]
Name: b, dtype: object
In [3]: df1 = df.groupby('a')['b'].apply(list).reset_in...
Mocking Extension Methods with Moq
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edited Jun 20 at 9:12
Community♦
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answered Aug 23 '11 at 6:20
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Git Cherry-pick vs Merge Workflow
... had a colleague who had 3 months worth of changes to merge, and got some 9000 conflicts in 250000 line code-base. What we did to fix is do the merge one month's worth at a time: conflicts do not build up linearly, and doing it in pieces results in far fewer than 9000 conflicts. It was still a lot...
Is cout synchronized/thread-safe?
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106
The C++03 standard does not say anything about it. When you have no guarantees about the thread...
When should I use a List vs a LinkedList
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109
Edit
Please read the comments to this answer. People claim I did not do
proper tests. I a...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...shCode() {
int result = firstName != null ? firstName.hashCode() : 0;
result = 31 * result + (lastName != null ? lastName.hashCode() : 0);
return result;
}
public String toString() {
return "Person(" + firstName + "," + lastName + ")";
}
}
Then, in usag...
Number of days in particular month of particular year?
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20 Answers
20
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Call method in directive controller from other controller
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10
+1 One should never call a function in a directive from outside the directive - it's bad practice. Using a service to manage global state th...
How can I select the first day of a month in SQL?
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30 Answers
30
Active
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Attach to a processes output for viewing
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answered Apr 3 '09 at 21:20
Don WerveDon Werve
4,98222 gold badges2323 silver badges3131 bronze badges
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