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Which is faster: Stack allocation or Heap allocation
...ack allocation is much faster since all it really does is move the stack pointer.
Using memory pools, you can get comparable performance out of heap allocation, but that comes with a slight added complexity and its own headaches.
Also, stack vs. heap is not only a performance consideration; it al...
Bash continuation lines
...r '\n' ' '
Or if it is a variable definition newlines gets automatically converted to spaces. So, strip of extra spaces only if applicable.
x="continuation
of multiple
lines"
y="red|blue|
green|yellow"
echo $x # This will do as the converted space actually is meaningful
echo $y | tr -d ' ' # Str...
Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...
...和recv函数详解以及利用select()函数来进行指定时间的阻塞int send( SOCKET s, const char FAR *buf, int len, int flags ); 不论是客户还是服务器应用程序都用send函数来向TCP连接的...int send( SOCKET s, const char FAR *buf, int len, int flags );
不论是客户还...
Global variables in Java
...u can make use of static Keyword
public class Example {
public static int a;
public static int b;
}
now you can access a and b from anywhere
by calling
Example.a;
Example.b;
share
|
im...
How do short URLs services work?
...shortening services simply take the ID in the database of the URL and then convert it to either Base 36 [a-z0-9] (case insensitive) or Base 62 (case sensitive).
A simplified example of a TinyURL Database Table:
ID URL VisitCount
1 www.google.com ...
How do I sort an observable collection?
...no other answers here do at time of writing. The observable is partitioned into a left sorted half and a right unsorted half, where each time the minimum item (as found in the sorted list) is shifted to the end of the sorted partition from the unsorted. Worst case O(n). Essentially a selection sort ...
How do I get a YouTube video thumbnail from the YouTube API?
...6) "https://i.ytimg.com/vi/T0Jqdjbed40/default.jpg"
["width"]=>
int(120)
["height"]=>
int(90)
}
["medium"]=>
object(stdClass)#7 (3) {
["url"]=>
string(48) "https://i.ytimg.com/vi/T0Jqdjbed40/mqdefault.jpg"
["width"]=>
int(320)
["height"]=>
...
Actionbar notification count icon (badge) like Google has
...nActivity - setting and updating my view
static Button notifCount;
static int mNotifCount = 0;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
View count = menu.findItem(R.id.badge).ge...
static constructors in C++? I need to initialize private static objects
... see if the vector is initialized, and initialize it if it's not, but that introduces many necessary checks and doesn't seem like the optimal solution to the problem.
...
Callback to a Fragment from a DialogFragment
...alogFragment.
Fragment class:
public class MyFragment extends Fragment {
int mStackLevel = 0;
public static final int DIALOG_FRAGMENT = 1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mStackLevel...