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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... and I want to add two new columns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
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What is the difference between “int” and “uint” / “long” and “ulong”?
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230
The primitive data types prefixed with "u" are unsigned versions with the same bit sizes. Effect...
Sort a text file by line length including spaces
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Answer
cat testfile | awk '{ print length, $0 }' | sort -n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" " -f2-
In both cases, we have solved...
Objective-C Split()?
...it strings in objective c into arrays? I mean like this - input string Yes:0:42:value into an array of (Yes,0,42,value)?
5 ...
What does tilde-greater-than (~>) mean in Ruby gem dependencies? [duplicate]
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207
It means "equal to or greater than in the last digit", so e.g. ~> 2.3 means
"equal to 2.3 or...
oracle10g 网址收藏 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
oracle10g 网址收藏载OTN上的这些软件，你需要一个OTN免费帐号，不过如果通过迅雷进行下载，就不用登陆OTN了：Oracle Database 10g Release 2 (10.2.0.1....载OTN上的这些软件，你需要一个OTN免费帐号，不过如果通过迅雷进行下载，就不用登...
How to change the playing speed of videos in HTML5?
...o twice as fast */
document.querySelector('video').defaultPlaybackRate = 2.0;
document.querySelector('video').play();
/* now play three times as fast just for the heck of it */
document.querySelector('video').playbackRate = 3.0;
The above works on Chrome 43+, Firefox 20+, IE 9+, Edge 12+.
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Angularjs Template Default Value if Binding Null / Undefined (With Filter)
... edited Mar 11 '14 at 21:41
0xcaff
9,82033 gold badges3939 silver badges5353 bronze badges
answered May 13 '13 at 13:27
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Return positions of a regex match() in Javascript?
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answered Feb 19 '10 at 10:49
GumboGumbo
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PyLint, PyChecker or PyFlakes? [closed]
...atis
import sys, time
stdout = sys.stdout
BAILOUT = 16
MAX_ITERATIONS = 1000
class Iterator(object) :
def __init__(self):
print 'Rendering...'
for y in xrange(-39, 39):
stdout.write('\n')
for x in xrange(-39, 39):
if self.mandelbrot(x...