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Is there any difference between __DIR__ and dirname(__FILE__) in PHP?
... the same output :
string '/home/squale/developpement/tests/temp' (length=37)
But, there are at least two differences :
__DIR__ only exists with PHP >= 5.3
which is why dirname(__FILE__) is more widely used
__DIR__ is evaluated at compile-time, while dirname(__FILE__) means a function-ca...
LINQ Aggregate algorithm explained
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1030
The easiest-to-understand definition of Aggregate is that it performs an operation on each elem...
Get PostGIS version
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334
Since some of the functions depend on other libraries like GEOS and proj4 you might want to ge...
Changing the “tick frequency” on x or y axis in matplotlib?
... numpy as np
import matplotlib.pyplot as plt
x = [0,5,9,10,15]
y = [0,1,2,3,4]
plt.plot(x,y)
plt.xticks(np.arange(min(x), max(x)+1, 1.0))
plt.show()
(np.arange was used rather than Python's range function just in case min(x) and max(x) are floats instead of ints.)
The plt.plot (or ax.plot) ...
In Visual Studio C++, what are the memory allocation representations?
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3 Answers
3
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How to find the 'sizeof' (a pointer pointing to an array)?
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13 Answers
13
Active
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MVC3 Razor: Displaying html within code blocks
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230
You could use @: to escape:
@if(Model.foo)
{
@:Hello World
}
or the special <text>...
How to get a thread and heap dump of a Java process on Windows that's not running in a console
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380
You can use jmap to get a dump of any process running, assuming you know the pid.
Use Task Ma...
Is a `=default` move constructor equivalent to a member-wise move constructor?
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answered Aug 17 '13 at 16:11
Pierre FourgeaudPierre Fourgeaud
13.4k11 gold badge3131 silver badges5555 bronze badges
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Get statistics for each group (such as count, mean, etc) using pandas GroupBy?
...t once. This should give you the result you need:
df[['col1', 'col2', 'col3', 'col4']].groupby(['col1', 'col2']).agg(['mean', 'count'])
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