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How to set up Spark on Windows?
... http://spark.apache.org/docs/latest/building-spark.html
Download and install Maven, and set MAVEN_OPTS to the value specified in the guide.
But if you're just playing around with Spark, and don't actually need it to run on Windows for any other reason that your own machine is running Windows, I'd...
The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead [dupl
...hy is this happening?
The entire ext/mysql PHP extension, which provides all functions named with the prefix mysql_, was officially deprecated in PHP v5.5.0 and removed in PHP v7.
It was originally introduced in PHP v2.0 (November 1997) for MySQL v3.20, and no new features have been added since 2...
Disable submit button when form invalid with AngularJS
...
+1 Coincidentally, I was just reading this great post of yours: benlesh.com/2012/11/angular-js-form-validation.html
– Ben
May 15 '14 at 17:48
...
Are Swift variables atomic?
... you, i.e.:
class Car {
static let sharedCar: Car = Car() // will be called inside of dispatch_once
}
private let sharedCar: Car2 = Car2() // same here
class Car2 {
}
Update 05/25/16: Keep an eye out for swift evolution proposal https://github.com/apple/swift-evolution/blob/master/proposals...
HTML / CSS How to add image icon to input type=“button”?
...right>;
padding-<left|right>: <width of image>px;
It's usually a little easier to use a button with an img inside:
<button type="submit"><img> Text</button>
However the browser implementations of button for submitting are inconsistent, as well as the fact that a...
Why can a class not be defined as protected?
...lare class member as protected its visibility is classes at same package (called the package access) and the Subclassess. If you try to access from a outter class in other package this protected method member is not visible.
– kelgwiin
Jun 17 '15 at 13:59
...
Example: Communication between Activity and Service using Messaging
...ice example.
Your Service returns an instance of itself to consumers who call onBind. Then you can directly interact with the service, e.g. registering your own listener interface with the service, so that you can get callbacks.
...
Finding Variable Type in JavaScript
... siple function would be:function getVariableType(object){ return(object.__proto__.constructor.name); }
– Stu
Mar 4 '18 at 15:23
...
SQLite Concurrent Access
...emely fast and has many clever optimizations to minimize contention. Especially SQLite 3.
For most desktop/laptop/tablet/phone applications, SQLite is fast enough as there's not enough concurrency. (Firefox uses SQLite extensively for bookmarks, history, etc.)
For server applications, somebody som...
Do spurious wakeups in Java actually happen?
...hread_cond_wait() function in Linux is implemented using the futex system call. Each blocking system call on Linux returns abruptly with EINTR when the process receives a signal. ... pthread_cond_wait() can't restart the waiting because it may miss a real wakeup in the little time it was outside the...