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Find column whose name contains a specific string
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239
Just iterate over DataFrame.columns, now this is an example in which you will end up with a lis...
rotating axis labels in R
...f axis labels. (0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
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switch() statement usage
...e) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 secs
system.time( for(i in 1:1e6) test2('mean') ) #...
Eclipse: How do you change the highlight color of the currently selected method/expression?
...is highlight, but after scouring the eclipse preferences many times in all 3 places, I have yet to find it.
5 Answers
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Explicitly calling a default method in Java
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348
As per this article you access default method in interface A using
A.super.foo();
This coul...
Package doesn't exist error in intelliJ
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mattalxndrmattalxndr
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Default value of function parameter
... suppose:
lib.h
int Add(int a, int b);
lib.cpp
int Add(int a, int b = 3) {
...
}
test.cpp
#include "lib.h"
int main() {
Add(4);
}
The compilation of test.cpp will not see the default parameter declaration, and will fail with an error.
For this reason, the default parameter definit...
IOS: create a UIImage or UIImageView with rounded corners
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237
Yes, it is possible.
Import the QuartzCore (#import <QuartzCore/QuartzCore.h>) header an...