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Best practices for circular shift (rotate) operations in C++
...viour seems to be John Regehr's implementation. I've adapted it to rotate by the width of the type (using fixed-width types like uint32_t).
#include <stdint.h> // for uint32_t
#include <limits.h> // for CHAR_BIT
// #define NDEBUG
#include <assert.h>
static inline uint32_t ro...
Highlight text similar to grep, but don't filter out text [duplicate]
...ince it's not a character.
(Note that most of the setups will use --color by default. You may not need that flag).
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What is DOCTYPE?
...the differences in rendering when using various DOCTYPEs. XHTML is enabled by certain DOCTYPEs, and there is quite a bit of debate about the use of XHTML which is covered well in XHTML — myths and reality.
There are subtle differences between different "standards compliant" rendering DOCTYPEs...
Disable copy constructor
...s I think the time spent following this pattern is greater than time saved by the errors it prevents. I simply forbid copy whenever not sure.
– Tomáš Zato - Reinstate Monica
Jan 14 '16 at 9:37
...
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...
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...
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...
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...
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 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 ...