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How does the new automatic reference counting mechanism work?
... and make mistakes, but computers are much more consistent.
However, this doesn't completely free you from worrying about memory management on these platforms. I describe the primary issue to watch out for (retain cycles) in my answer here, which may require a little thought on your part to mark w...
Understanding what 'type' keyword does in Scala
...scenarios if the path by which we reach to the type (of course via object) does basically matter. Thanks to the advanced features in scala, it is possible:
Path-dependent types:
Scala objects can have types as members. The meaning of the type, depends on the path you use to access it. The path is d...
How to make asynchronous HTTP requests in PHP
...r I'd previously accepted didn't work. It still waited for responses. This does work though, taken from How do I make an asynchronous GET request in PHP?
function post_without_wait($url, $params)
{
foreach ($params as $key => &$val) {
if (is_array($val)) $val = implode(',', $val);
...
Does making a struct volatile make all its members volatile?
...on can be asked (or simply another way to look at the original question):
Does making a struct const make all its members const?
If I have:
struct whatever { int data; };
const whatever test;
Will test.data be const too?
My answer is : Yes. If you declare an object of type whatever with const...
How does one use rescue in Ruby without the begin and end block
...-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f1542672%2fhow-does-one-use-rescue-in-ruby-without-the-begin-and-end-block%23new-answer', 'question_page');
}
);
Post as a guest
...
Angular JS break ForEach
... loop and i want to break from loop if i match a value. The following code does not work.
21 Answers
...
Accessing inactive union member and undefined behavior?
...g the use of unions containing structs with common initial sequences; this doesn't however permit type-punning.
To determine whether union type-punning is allowed in C++, we have to search further. Recall that c99 is a normative reference for C++11 (and C99 has similar language to C11 permitting u...
Java 7 language features with Android
...y in 4.4+)
The @SafeVarargs annotation — because "java.lang.SafeVarargs" does not exist
... "yet" :) It turns out that, although Android's library is targeting for 1.6, the Android source does contain interfaces like AutoCloseable and traditional interfaces like Closeable does inherit from AutoC...
How do I 'svn add' all unversioned files to SVN?
...c:\work\repo1>svn add . --force
Adds the contents of subdirectories.
Does not add ignored files.
Lists what files were added.
The dot in the command indicates the current directory, this can replaced by a specific directory name or path if you want to add a different directory than the curre...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
... a lot less common partially because it is so counter-intuitive, though it does have one very important application: functions.
trait Function1[-P, +R] {
def apply(p: P): R
}
Notice the "-" variance annotation on the P type parameter. This declaration as a whole means that Function1 is contrav...