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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') ) #...
Find column whose name contains a specific string
...
239
Just iterate over DataFrame.columns, now this is an example in which you will end up with a lis...
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...
How do I open links in Visual Studio in my web browser and not in Visual Studio?
...
63
There is an extension that provides this behavior called Open in External Browser. It works in V...
How to use WeakReference in Java and Android development?
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231
Using a WeakReference in Android isn't any different than using one in plain old Java. Here is...
Package doesn't exist error in intelliJ
...
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How to synchronize a static variable among threads running different instances of a class in Java?
...nchronized (countLock) {
count++;
}
}
}
Method 3 is the best in many cases because the lock object is not exposed outside of your class.
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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...