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Efficient way to apply multiple filters to pandas DataFrame or Series
...df.loc[df['col1'] >= 1, 'col1']
Out[11]:
1 1
2 2
Name: col1
In [12]: df[df['col1'] >= 1]
Out[12]:
col1 col2
1 1 11
2 2 12
In [13]: df[(df['col1'] >= 1) & (df['col1'] <=1 )]
Out[13]:
col1 col2
1 1 11
If you want to write helper functions for t...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
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edited Jan 7 '12 at 1:34
answered Jan 6 '12 at 19:45
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Add object to ArrayList at specified index
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edited Sep 12 '11 at 8:15
answered Sep 12 '11 at 8:09
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efficient circular buffer?
...or i in xrange(20):
... d.append(i)
...
>>> d
deque([10, 11, 12, 13, 14, 15, 16, 17, 18, 19], maxlen=10)
There is a recipe in the docs for deque that is similar to what you want. My assertion that it's the most efficient rests entirely on the fact that it's implemented in C by an inc...
Open popup and refresh parent page on close popup
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edited May 29 '12 at 2:37
answered May 29 '12 at 2:35
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how do I work around log4net keeping changing publickeytoken
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answered Jan 10 '12 at 16:22
David ChristiansenDavid Christiansen
5,68211 gold badge3434 silver badges4141 bronze badges
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How do you get centered content using Twitter Bootstrap?
... Answer (pre 2.3.0)
You need to define one of the two classes, row or span12 with a text-align: center. See http://jsfiddle.net/xKSUH/ or http://jsfiddle.net/xKSUH/1/
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Calculate number of hours between 2 dates in PHP
...cts:
// Create two new DateTime-objects...
$date1 = new DateTime('2006-04-12T12:30:00');
$date2 = new DateTime('2006-04-14T11:30:00');
// The diff-methods returns a new DateInterval-object...
$diff = $date2->diff($date1);
// Call the format method on the DateInterval-object
echo $diff->form...
How to get device make and model on iOS?
...ax
@"iPhone11,6" on iPhone XS Max China
@"iPhone11,8" on iPhone XR
@"iPhone12,1" on iPhone 11
@"iPhone12,3" on iPhone 11 Pro
@"iPhone12,5" on iPhone 11 Pro Max
@"iPhone12,8" on iPhone SE (2nd Gen)
//iPad 1
@"iPad1,1" on iPad - Wifi (model A1219)
@"iPad1,2" on iPad - Wifi + Cellular (model A1337)
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Real life example, when to use OUTER / CROSS APPLY in SQL
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answered Feb 14 '12 at 11:12
Martin SmithMartin Smith
389k7575 gold badges657657 silver badges761761 bronze badges
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