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Should I add .vcxproj.filter files to source control?
... for automatic rebuilds, you build if any file has changed (eg source), so now nothing has changed except we have an yet another file to manage.
– gbjbaanb
May 15 '10 at 22:39
3
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Remove duplicated rows using dplyr
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Note: dplyr now contains the distinct function for this purpose.
Original answer below:
library(dplyr)
set.seed(123)
df <- data.frame(
x = sample(0:1, 10, replace = T),
y = sample(0:1, 10, replace = T),
z = 1:10
)
One appr...
PHP Error handling: die() Vs trigger_error() Vs throw Exception
In regards to Error handling in PHP -- As far I know there are 3 styles:
2 Answers
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How to write Unicode characters to the console?
...oose some font that supports your language (like KaiTi in Chinese case):
Now you are set to go:
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Acronyms in CamelCase [closed]
... an abbreviation of "identifier" or "identification"), but I don't really know how/if this guideline helps with that one. :-\
– bryant
Apr 16 '14 at 4:23
68
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sql primary key and index
...ate your own alternate index on that column, then drop the default index.
Now for the fun part--when do you NOT want a unique primary key index? You don't want one, and can't tolerate one, when your table acquires enough data (rows) to make the maintenance of the index too expensive. This varies ...
Android, ListView IllegalStateException: “The content of the adapter has changed but ListView did no
... @user3019105 check the edited answer. Hope its helpful to you now
– Javanator
May 4 '14 at 12:15
this ans...
C/C++ Struct vs Class
...ere was a difference in the first place long ago, back when C++ was still known as "C with Classes."
Note that C unions work with C++, but not the other way around. For example
union WorksWithCppOnly{
WorksWithCppOnly():a(0){}
friend class FloatAccessor;
int a;
private:
float b;
}...
File.separator vs FileSystem.getSeparator() vs System.getProperty(“file.separator”)?
...tSeparator(); was introduced in Java 7, so you might as well ignore it for now if you want your code to be portable across older Java versions.
So, every one of these options is almost the same as others, but not quite. Choose one that suits your needs.
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Prevent direct access to a php include file
... This is how a few 'mainstream' applications handle it. I know Joomla does it this way and I think Wiki, Wordpress, and others as well.
– UnkwnTech
Jan 3 '09 at 18:20
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