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Subset of rows containing NA (missing) values in a chosen column of a data frame
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JelenaČuklina
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answered Nov 2 '11 at 13:02
Joris MeysJoris Mey...
MySQL vs MySQLi when using PHP [closed]
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edited Dec 30 '15 at 5:52
Tharif
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answe...
How to get whole and decimal part of a number?
Given, say, 1.25 - how do I get "1" and ."25" parts of this number?
16 Answers
16
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Differences and relationship between glActiveTexture and glBindTexture
...nstance of type Object, you would change its state as follows: obj.count = 5; You would directly reference an instance of the object, get the particular piece of state you want to change, and shove a value into it.
In OpenGL, you don't do this.
For legacy reasons better left unexplained, to change...
Simple tool to 'accept theirs' or 'accept mine' on a whole file using git
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5 Answers
5
Active
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Rails: select unique values from a column
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454
Model.select(:rating)
Result of this is a collection of Model objects. Not plain ratings. And...
Undoing a git rebase
...before reseting with the --hard option).
Suppose the old commit was HEAD@{5} in the ref log:
git reset --hard HEAD@{5}
In Windows, you may need to quote the reference:
git reset --hard "HEAD@{5}"
You can check the history of the candidate old head by just doing a git log HEAD@{5} (Windows: gi...
Hidden features of HTML
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5
There's one major drawback: when a file is saved to disk and accessed using the file: protocol, the browser won't be able to find the resour...
How do I use a PriorityQueue?
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455
Use the constructor overload which takes a Comparator<? super E> comparator and pass in a...
How to apply a function to two columns of Pandas dataframe
...n [49]: df
Out[49]:
0 1
0 1.000000 0.000000
1 -0.494375 0.570994
2 1.000000 0.000000
3 1.876360 -0.229738
4 1.000000 0.000000
In [50]: def f(x):
....: return x[0] + x[1]
....:
In [51]: df.apply(f, axis=1) #passes a Series object, row-wise
Out[51]:
0 1....