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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...
Show DialogFragment with animation growing from a point
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+100
Being DialogFragment a wrapper for the Dialog class, you should set a theme to your base Dialog to get the animation you want:
publi...
Can't install RMagick 2.13.1. Can't find MagickWand.h.
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70
I had a similar issue with running
$ gem install rmagick
First of all, do you have imagemagic...
How do I find out my MySQL URL, host, port and username?
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10 Answers
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Which Eclipse version should I use for an Android app?
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103
Update July 2017:
From ADT Plugin page, the question must be unasked:
The Eclipse ADT plugin ...
I want to delete all bin and obj folders to force all projects to rebuild everything
... xargs may split into multiple entries. If your shell supports them, -print0 and -0 will work around this short-coming, so the above examples become:
find . -iname "bin" -print0 | xargs -0 rm -rf
find . -iname "obj" -print0 | xargs -0 rm -rf
and:
find . -iname "bin" -o -iname "obj" -print0 | xar...
Pinging servers in Python
...mmand = ['ping', param, '1', host]
return subprocess.call(command) == 0
Note that, according to @ikrase on Windows this function will still return True if you get a Destination Host Unreachable error.
Explanation
The command is ping in both Windows and Unix-like systems.
The option -n (Wind...
Creating an array of objects in Java
...e this:
a1 = new A();
Similarly, with the array you need to do this:
a[0] = new A();
...before using it.
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Why is `std::move` named `std::move`?
...eadable.
The history of move dates back to the original move proposal in 2002. This paper first introduces the rvalue reference, and then shows how to write a more efficient std::swap:
template <class T>
void
swap(T& a, T& b)
{
T tmp(static_cast<T&&>(a));
a = s...
Printing the correct number of decimal points with cout
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205
With <iomanip>, you can use std::fixed and std::setprecision
Here is an example
#includ...