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What are the rules about using an underscore in a C++ identifier?
...n C++11):
Reserved in any scope, including for use as implementation macros:
identifiers beginning with an underscore followed immediately by an uppercase letter
identifiers containing adjacent underscores (or "double underscore")
Reserved in the global namespace:
identifiers beginning with a...
What does “dereferencing” a pointer mean?
...iable that is a pointer to a structure with data members, you can access those members using the -> dereferencing operator:
typedef struct X { int i_; double d_; } X;
X x;
X* p = &x;
p->d_ = 3.14159; // Dereference and access data member x.d_
(*p).d_ *= -1; // Another equivalent notat...
REST API Token-based Authentication
...to include a random component ("nonce") in the URL.
url = username:key@myhost.com/api/call/nonce
If that is not possible, and the transmitted information is not secret, I recommend securing the request with a hash, as you suggested in the token approach. Since the hash provides the security, you ...
Constant Amortized Time
...e last enlarge. But you've also waited twice as long before doing it! The cost of each enlargement can thus be "spread out" among the insertions. This means that in the long term, the total time taken for adding m items to the array is O(m), and so the amortised time (i.e. time per insertion) is O(1...
What's the difference between the atomic and nonatomic attributes?
...ead B calls the setter, an actual viable value -- an autoreleased object, most likely -- will be returned to the caller in A.
In nonatomic, no such guarantees are made. Thus, nonatomic is considerably faster than "atomic".
What "atomic" does not do is make any guarantees about thread safety. If...
How do I export UIImage array as a movie?
...h several UIImage objects. What I now want to do, is create movie from those UIImages . But I don't have any idea how to do so.
...
What do 'statically linked' and 'dynamically linked' mean?
...
There are (in most cases, discounting interpreted code) two stages in getting from source code (what you write) to executable code (what you run).
The first is compilation which turns source code into object modules.
The second, linking, ...
RabbitMQ and relationship between channel and connection
...prefer
using a Channel per thread instead of sharing the same Channel across
multiple threads.
There is no direct relation between Channel and Queue. A Channel is used to send AMQP commands to the broker. This can be the creation of a queue or similar, but these concepts are not tied together....
How can I exclude all “permission denied” messages from “find”?
...may be good enough in many situations. It may still be of interest for a cross-platform perspective and for its discussion of some advanced shell techniques in the interest of finding a solution that is as robust as possible, even though the cases guarded against may be largely hypothetical.
* If yo...
Android ListView headers
...wo. getItemViewType should return what type of View we have at the input position.
Android will then take care of passing you the right type of View in convertView automatically.
Here what the result of the code below looks like:
First we have an interface that our two list item types will ...