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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]:
a b A1 A2
0 1 2 2 3
1 2 3 4 6
2 3 4 6 9
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SQL function as default parameter value?
...oesn't seem proper." Still thank you Brian.
– user58044
Jan 22 '09 at 20:43
This solution is perfect.
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Comparing strings by their alphabetical order
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Randy
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answered Jun 1 '11 at 15:18
BuhbBuhb
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How to not run an example using roxygen2?
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4 Answers
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How to test if one java class extends another at runtime?
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answered Aug 17 '10 at 16:48
meritonmeriton
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how to hide a vertical scroll bar when not needed
...s taller than 159px it won't start scrolling until the text is taller than 400px which is the height of the textbox.
Try this: http://jsfiddle.net/G9rfq/1/
I set overflow:auto on the text box, and made the textbox the same size as the div.
Also I don't believe it's valid to have a div inside a la...
sbt-assembly: deduplication found error
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248
Add the code below to your build.sbt file
assemblyMergeStrategy in assembly := {
case PathLis...
IntelliJ gives Fatal Error: Unable to find package java.lang in classpath or bootclasspath
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244
Somehow the JDK language jars were removed from the classpath. All I had to do was reapply the ...
Difference between fmt.Println() and println() in Go
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edited Dec 11 '18 at 8:49
rob74
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answered Feb 4 '13 at 4:28
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How does Task become an int?
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edited Apr 24 '19 at 5:32
kmad1729
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