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Is there an R function for finding the index of an element in a vector?
... the position in the second argument of the values in the first argument.
For multiple matching, %in% is the way to go :
x <- sample(1:4,10,replace=TRUE)
x
# [1] 3 4 3 3 2 3 1 1 2 2
which(x %in% c(2,4))
# [1] 2 5 9 10
%in% returns a logical vector as long as the first argument, with a TRUE...
Transfer git repositories from GitLab to GitHub - can we, how to and pitfalls (if any)?
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Thanks Von - your answer did the trick for me.I've just added a bit to your answer regarding the exact git remote add cmd and pushing things the ssh way if the need be. Hope that's okay.
– boddhisattva
Mar 8 '14 at 9:29
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Init method in Spring Controller (annotation version)
.... The old system brings many circular dependencies to the table and I therefore must use setter-dependency a lot. That gave me some headaches since I could not trust @PostConstruct since autowiring/injection by setter was not yet done. The order is constructor, @PostConstruct then autowired setters....
Git merge without auto commit
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Note the output while doing the merge - it is saying Fast Forward
In such situations, you want to do:
git merge v1.0 --no-commit --no-ff
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Static fields on a null reference in Java
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@Falanwe: Agreed, and it's a construct for which I've not had a need, though I mostly work in .NET where it's not allowed. I guess you might want to call the appropriate static method of a subclass when you're given a reference to a parent class.
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Anonymous recursive PHP functions
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In order for it to work, you need to pass $factorial as a reference
$factorial = function( $n ) use ( &$factorial ) {
if( $n == 1 ) return 1;
return $factorial( $n - 1 ) * $n;
};
print $factorial( 5 );
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#ifdef in C#
...WriteLine("DEBUG and VC_V7 are not defined");
#endif
}
}
Only useful for excluding parts of methods.
If you use #if to exclude some method from compilation then you will have to exclude from compilation all pieces of code which call that method as well (sometimes you may load some classes at ...
How is the default submit button on an HTML form determined?
If a form is submitted but not by any specific button, such as
14 Answers
14
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iPad browser WIDTH & HEIGHT standard
Does anyone know the safest width and height for the BODY when viewing any web page on the iPad? I want to avoid the scrollbars as much as possible.
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How do I reverse a C++ vector?
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There's a function std::reverse in the algorithm header for this purpose.
#include <vector>
#include <algorithm>
int main() {
std::vector<int> a;
std::reverse(a.begin(), a.end());
return 0;
}
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