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What is the difference between a port and a socket?
...ress conditions.
The combination of an IP address and a port is strictly known as an endpoint and is sometimes called a socket. This usage originates with RFC793, the original TCP specification.
A TCP connection is defined by two endpoints aka sockets.
An endpoint (socket) is defined by the combi...
What is the correct way to create a single-instance WPF application?
...s, it
brings on a lot of overhead, and I wanted something cleaner.
Knowing that I could use a mutex for this (but never having done it
before) I set out to cut down my code and simplify my life.
In the class of my application main I created a static named Mutex:
static class Program
...
Differences between Perl and PHP [closed]
I'm planning to learn Perl 5 and as I have only used PHP until now, I wanted to know a bit about how the languages differ from each other.
...
CSS border less than 1px [duplicate]
...
In modern browsers, on UHD screens, sub-pixel widths are now possible.
– verism
Nov 27 '16 at 20:08
...
Extracting numbers from vectors of strings
...
gregexpr. I hadn't tried regexpr until just now. HUGE difference. Using regexpr puts it between Andrew's and Arun's solutions (second fastest) on a 1e6 set. Perhaps also interesting, using sub in Andrew's solution does not improve the speed.
– ...
App Inventor 2 项目合并工具 AIMerge · App Inventor 2 中文网
...ers can write code to call a screen they are not developing but they must know the name that has been assigned to that screen by its developer. Also, two different developers/screens can use the same database or asset but they must be named the same (for more details on this see the Universal Datab...
Why do pthreads’ condition variable functions require a mutex?
... condition variable; it is to protect the predicate data, but I think you know that from reading your comment that followed that statement. You can signal a condition variable legally, and fully supported by implementations, post-unlock of the mutex wrapping the predicate, and in fact you'll will re...
Difference between variable declaration syntaxes in Javascript (including global variables)?
...undefined.
This only applies to the window object, and only (as far as I know) to IE8 and earlier (or IE9-IE11 in the broken "compatibility" mode). Other browsers are fine with deleting window properties, subject to the rules above.
When var happens
The variables defined via the var statement a...
What does “abstract over” mean?
... (implicit ff: Foldable[F], m: Monoid[B]) =
ff.foldMap(as, f)
Now we have something quite general. The method mapReduce will fold any F[A] given that we can prove that F is foldable and that A is a monoid or can be mapped into one. For example:
case class Sum(value: Int)
case class Pro...
1030 Got error 28 from storage engine
...a cronjob to run this query every day:
PURGE BINARY LOGS BEFORE DATE_SUB( NOW(), INTERVAL 2 DAY );
This will remove all binary logs older than 2 days.
I found this solution here.
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