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How to remove last n characters from every element in the R vector
..._bar","bar_foo","apple","beer")
a = data.frame("data"=char_array,"data2"=1:4)
a$data = substr(a$data,1,nchar(a$data)-3)
a should now contain:
data data2
1 foo_ 1
2 bar_ 2
3 ap 3
4 b 4
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Implementing slicing in __getitem__
... print val
...
>>> c = C()
>>> c[3]
3
>>> c[3:4]
slice(3, 4, None)
>>> c[3:4:-2]
slice(3, 4, -2)
>>> c[():1j:'a']
slice((), 1j, 'a')
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Read user input inside a loop
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answered Jul 30 '11 at 13:42
dankdank
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Python using enumerate inside list comprehension
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4
Not mandatory to be a tuple. Any expression using i and j that returns a value will do
– Alvaro
Jul 2...
what is the function of webpages:Enabled in MVC 3 web.config
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240
webPages:enabled with value false prevents .cshtml or .vbhtml files in the Views folder from be...
Selecting pandas column by location
...e to mind:
>>> df
A B C D
0 0.424634 1.716633 0.282734 2.086944
1 -1.325816 2.056277 2.583704 -0.776403
2 1.457809 -0.407279 -1.560583 -1.316246
3 -0.757134 -1.321025 1.325853 -2.513373
4 1.366180 -1.265185 -2.184617 0.881514
>>> df.iloc...
Asterisk in function call
...rguments in the function call.
So if uniqueCrossTabs was [ [ 1, 2 ], [ 3, 4 ] ], then itertools.chain(*uniqueCrossTabs) is the same as saying itertools.chain([ 1, 2 ], [ 3, 4 ])
This is obviously different from passing in just uniqueCrossTabs. In your case, you have a list of lists that you wish t...
Joda-Time: what's the difference between Period, Interval and Duration?
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248
3 classes are needed because they represent different concepts so it is a matter of picking the...
Return two and more values from a method
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4 Answers
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Python Dictionary to URL Parameters
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answered Aug 5 '09 at 14:16
mipadimipadi
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