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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:
...
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="...
Getting the count of unique values in a column in bash
...demonstrates so much of the capability of awk.
– David Mann
Apr 29 '13 at 15:30
This script was helpful for me to det...
Calling a Method From a String With the Method's Name in Ruby
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Stop Visual Studio from mixing line endings in files
...mate, however this option is not a global persistent option and is only valid for the current editor session. All I want is for VS to respect the currently open files line-endings when editing the file.
– Brett Ryan
Oct 25 '10 at 1:26
...
how do you filter pandas dataframes by multiple columns
To filter a dataframe (df) by a single column, if we consider data with male and females we might:
6 Answers
...
XML Validation with XSD in Visual Studio IDE
...s, that is a great detailed explanation, but mine still isn't working. I didn't know you could get to the schemas list from properties like that.
– Jim McKeeth
Jul 1 '10 at 20:49
...
How to copy data to clipboard in C#
...ation, make sure Main is marked with [STAThread] attribute. Step-by-step guide in another answer
using System.Windows.Forms;
To copy an exact string (literal in this case):
Clipboard.SetText("Hello, clipboard");
To copy the contents of a textbox either use TextBox.Copy() or get text first and...