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Why is “final” not allowed in Java 8 interface methods?
...e going to be different from interface methods, no matter what the intent, by virtue of the fact that interface methods can be multiply inherited.)
The basic idea of a default method is: it is an interface method with a default implementation, and a derived class can provide a more specific impleme...
PHP 5: const vs static
...where via ClassName::$variable.
protected static variables can be accessed by the defining class or extending classes via ClassName::$variable.
private static variables can be accessed only by the defining class via ClassName::$variable.
Edit: It is important to note that PHP 7.1.0 introduced su...
Configuring Log4j Loggers Programmatically
...d through other appenders in other categories (unless configured otherwise by setting the additivity flag).
If you need to know how logging works and how is decided where logs are written read this manual for more infos about that.
In Short:
Logger fizz = LoggerFactory.getLogger("com.fizz")
...
How can I determine whether a 2D Point is within a Polygon?
...n points as before, now we need the actual sides. A side is always defined by two points.
side 1: (X1/Y1)-(X2/Y2)
side 2: (X2/Y2)-(X3/Y3)
side 3: (X3/Y3)-(X4/Y4)
:
You need to test the ray against all sides. Consider the ray to be a vector and every side to be a vector. The ray has to hit each si...
What is std::promise?
... via the member function get(), which effectively synchronizes the program by waiting for the result. Alternatively, a future supports wait_for(), which can be used to probe whether or not the result is already available. Futures should be thought of as the asynchronous drop-in replacement for...
HttpSecurity, WebSecurity and AuthenticationManagerBuilder
...enticationManagerBuilder) is used to establish an authentication mechanism by allowing AuthenticationProviders to be added easily: e.g. The following defines the in-memory authentication with the in-built 'user' and 'admin' logins.
public void configure(AuthenticationManagerBuilder auth) {
auth...
How do I set the default locale in the JVM?
...ale.getDefault() method returns the locale that was initially determined
by the Java Virtual Machine (JVM) when it first loaded. That is, the
JVM determines the default locale from the host environment. The host
environment's locale is determined by the host operating system and
the user pre...
MySQL: Enable LOAD DATA LOCAL INFILE
... Works for Mac, too. For Mac user, /mysql/my.cnf does not exist by default. Just create the directory and the file, and paste these lines into the file.
– Zheng Liu
Dec 27 '18 at 3:15
...
How can I generate an MD5 hash?
... to get a MD5 instance of MessageDigest you can use.
The compute the hash by doing one of:
Feed the entire input as a byte[] and calculate the hash in one operation with md.digest(bytes).
Feed the MessageDigest one byte[] chunk at a time by calling md.update(bytes). When you're done adding input ...
How can I show hidden files (starting with period) in NERDTree?
...gle hidden files in the NERDTree explorer window.
To enable this behavior by default, add this line to your .vimrc file:
let NERDTreeShowHidden=1
For more detail, access the NERDTree help file :help NERD_tree.txt and search for "hidden".
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