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Pass column name in data.table using variable [duplicate]
... I already have a gazillion column names in a character vector all there with double quotes around them. How do I get rid of the quotes?
– Farrel
Jun 28 '16 at 0:23
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How can we access context of an application in Robolectric?
Actually, I need to get a response of an API call, for that I required Context .
14 Answers
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Select Pandas rows based on list index
...col=0, names=...)
This will now return a DataFrame from a file that skips all rows except 1 and 3.
Details
From the docs:
skiprows : list-like or integer or callable, default None
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If callable, the callable function will be evaluated against the row indices, returning True if the row should be...
Get started with Latex on Linux [closed]
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First you'll need to Install it:
If you're using a distro which packages LaTeX (almost all will do) then look for texlive or tetex. TeX Live is the newer of the two, and is replacing tetex on most distributions now.
If you're using Debian or Ubunt...
JSON.NET Error Self referencing loop detected for type
I tried to serialize POCO class that was automatically generated from Entity Data Model .edmx and when I used
25 Answers
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Pairs from single list
...e=2):
it = iter(t)
return izip(*[it]*size)
When you want to pair all elements you obviously might need a fillvalue:
from itertools import izip_longest
def blockwise(t, size=2, fillvalue=None):
it = iter(t)
return izip_longest(*[it]*size, fillvalue=fillvalue)
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What are the undocumented features and limitations of the Windows FINDSTR command?
...utput
The documentation never bothers to explain the output of FINDSTR. It alludes to the fact that matching lines are printed, but nothing more.
The format of matching line output is as follows:
filename:lineNumber:lineOffset:text
where
fileName: = The name of the file containing the matching line....
Are arrays in PHP copied as value or as reference to new variables, and when passed to functions?
...ing too: thought it was something weird about nested arrays but it was actually just how array assignment works in PHP.
– Jeremy List
Jul 23 '15 at 7:45
add a comment
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What is the equivalent of the C# 'var' keyword in Java?
...to give a proper type to myData. 6 years ago, this was impossible in Java (all Types had names, even if they were extremely verbose and unweildy). I do not know if this has changed in the mean time.
var is not the same as dynamic. variables are still 100% statically typed. This will not compile:
va...
Read url to string in few lines of java code
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Just don't forget you need to call Scanner#close() later.
– Marcelo
Dec 21 '12 at 3:55
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