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Split list into multiple lists with fixed number of elements
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There is much easier way to do the task using sliding method.
It works this way:
val numbers = List(1, 2, 3, 4, 5, 6 ,7)
Lets say you want to break the list into smaller lists of size 3.
numbers.sliding(3, 3).toList
will give you
List(List(1, 2, 3), List(4, 5, 6), L...
How do I increase the number of displayed lines of a Java stack trace dump?
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Quick guess at a method for you.
static void printLongerTrace(Throwable t){
for(StackTraceElement e: t.getStackTrace())
System.out.println(e);
}
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How to ignore whitespace in a regular expression subject string?
...d match. But wouldn't want "c ats" to match if there is no newline. Any ideas on how that might be done?
– Steven
Jan 4 '11 at 4:54
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How to create a temporary directory?
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To make it better, you can avoid an empty directory or at least contain the problem within a directory using a solution where you do: 1. TMPWORKDIR=$(basename 'mktemp -d -p /tmp/git/') and then 2. rmdir /tmp/git/"${TMPWORKDIR}". If the variable is empty n...
How to invoke a Linux shell command from Java
...orked. Actually I used "sh" instead of "csh".
– Farshid
Jun 2 '12 at 11:12
5
Warning: this soluti...
What is the meaning of polyfills in HTML5?
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A polyfill is a piece of code (or plugin) that provides the technology that you, the developer, expect the browser to provide natively.
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What is the difference between 'java', 'javaw', and 'javaws'?
...ecified class, and invoking that class's main method.
The javaw command is identical to java, except that with javaw there is no associated console window. Use javaw when you don't want a command prompt window to appear.
javaws command, the "Java Web Start command"
The javaws command launches J...
What does “atomic” mean in programming?
...;
Or to synchronize every access to the variable:
public synchronized void setFoo(long value) {
this.foo = value;
}
public synchronized long getFoo() {
return this.foo;
}
// no other use of foo outside of these two methods, unless also synchronized
Or to replace it with an AtomicLong:
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HashMap get/put complexity
...tainly isn't guaranteed - but it's usually what you should assume when considering which algorithms and data structures to use.
In JDK 8, HashMap has been tweaked so that if keys can be compared for ordering, then any densely-populated bucket is implemented as a tree, so that even if there are lots...
How can I create a correlation matrix in R?
..., y=seq(dim(y)[2]), z=COR, xlab="x column", ylab="y column")
text(expand.grid(x=seq(dim(x)[2]), y=seq(dim(y)[2])), labels=round(c(COR),2))
Edit:
Here is an example of custom row and column labels on a correlation matrix calculated with a single matrix:
png("corplot.png", width=5, height=5, units="...