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Rails - Validate Presence Of Association?
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answered Apr 16 '11 at 22:23
fl00rfl00r
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How do I pass parameters into a PHP script through a webpage?
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Presumably you're passing the arguments in on the command line as follows:
php /path/to/wwwpub...
How can I sort generic list DESC and ASC?
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edited Dec 9 '19 at 20:23
Neoaptt
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How to change past commit to include a missed file?
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answered Jan 16 '13 at 22:43
Rafał RawickiRafał Rawicki
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Pandas selecting by label sometimes return Series, sometimes returns DataFrame
... other ways, but in my opinion this is the cleanest.
In [2]: type(df.loc[[3]])
Out[2]: pandas.core.frame.DataFrame
In [3]: type(df.loc[[1]])
Out[3]: pandas.core.frame.DataFrame
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R object identification
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data(cars)
obj <- lm(dist ~ speed, data=cars)
..etc.
If obj is an S3 or S4 object, you can also try methods or showMethods, showClass, etc. Patrick Burns' R Inferno has a pretty good section on this (sec #7).
EDIT: Dirk and Hadley mention str(obj) in their answers. It really is much bette...
mingw-w64 threads: posix vs win32
I'm installing mingw-w64 on Windows and there are two options: win32 threads and posix threads. I know what is the difference between win32 threads and pthreads but I don't understand what is the difference between these two options. I doubt that if I will choose posix threads it will prevent me fro...
“Order by Col1, Col2” using entity framework
...Konamiman
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swap fragment in an activity via animation
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answered Mar 24 '12 at 23:03
sciutandsciutand
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