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What does “dereferencing” a pointer mean?
...ecause of that error in
the code is a failed dereference
operation. In Java the incorrect
dereference will be flagged politely
by the runtime system. In compiled
languages such as C, C++, and Pascal,
the incorrect dereference will
sometimes crash, and other times
corrupt memory in so...
Which annotation should I use: @IdClass or @EmbeddedId
The JPA (Java Persistence API) specification has 2 different ways to specify entity composite keys: @IdClass and @EmbeddedId .
...
What Android tools and methods work best to find memory/resource leaks? [closed]
...e of the most common errors that I found developing Android Apps is the “java.lang.OutOfMemoryError: Bitmap Size Exceeds VM Budget” error. I found this error frecuently on activities using lots of bitmaps after changing orientation: the Activity is destroyed, created again and the layouts are ...
Understanding ibeacon distancing
...o match our data points. The algorithm we came up with is shown below as Java code.
Note that the term "accuracy" here is iOS speak for distance in meters. This formula isn't perfect, but it roughly approximates what iOS does.
protected static double calculateAccuracy(int txPower, double rssi...
What is the Simplest Way to Reverse an ArrayList?
...nt, but also more verbose.
Alternatively, we can rewrite the above to use Java 8's stream API, which some people find more concise and legible than the above:
static <T> List<T> reverse(final List<T> list) {
final int last = list.size() - 1;
return IntStream.rangeClosed(0...
Objective-C Static Class Level variables
I have a class Film, each of which stores a unique ID. In C#, Java etc I can define a static int currentID and each time i set the ID i can increase the currentID and the change occurs at the class level not object level. Can this be done in Objective-C? I've found it very hard to find an answer for...
How do you make a deep copy of an object?
... A good article, which explains the deep copy through serialization : javaworld.com/article/2077578/learn-java/…
– Ad Infinitum
Aug 26 '16 at 10:58
...
Begin, Rescue and Ensure in Ruby?
...s always evaluated. That's why it's called ensure. So, it is equivalent to Java's and C#'s finally.
The general flow of begin/rescue/else/ensure/end looks like this:
begin
# something which might raise an exception
rescue SomeExceptionClass => some_variable
# code that deals with some excep...
Can I extend a class using more than 1 class in PHP?
...Perl 6, Squeak, Scala, Slate and Fortress. Traits have also been ported to Java and C#.
More information: https://wiki.php.net/rfc/traits
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Getter and Setter declaration in .NET [duplicate]
...These are just Methods that get and set as opposed to properties, like the Java way of doing things.
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