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filter for complete cases in data.frame using dplyr (case-wise deletion)
...um 1 2
## $ x2: num 1 2
## - attr(*, "na.action")= 'omit' Named int 3 4
## ..- attr(*, "names")= chr "3" "4"
ADDED Have updated to reflect latest version of dplyr and comments.
ADDED Have updated to reflect latest version of tidyr and comments.
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In C, do braces act as a stack frame?
...er JohnsonKristopher Johnson
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How to determine when Fragment becomes visible in ViewPager
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answered Jun 17 '12 at 23:42
gorngorn
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how to change default python version?
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Java switch statement: Constant expression required, but it IS constant
...essions for the specification of a constant expression1. This refers to §4.12.4 Final Variables which defines a "constant variable" as follows:
We call a variable, of primitive type or type String, that is final and initialized with a compile-time constant expression (§15.28) a constant varia...
Find first element by predicate
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741
No, filter does not scan the whole stream. It's an intermediate operation, which returns a lazy...
Size of Matrix OpenCV
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241
cv:Mat mat;
int rows = mat.rows;
int cols = mat.cols;
cv::Size s = mat.size();
rows = s.height...
Form inline inside a form horizontal in twitter bootstrap?
... albertedevigoalbertedevigo
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Can't get rid of header X-Powered-By:Express
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248
In Express >= 3.0.0rc5:
app.disable('x-powered-by');
Here is a simple middleware that rem...