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How to cast an Object to an int
...t;
Scenario 2: any numerical object
In Java Integer, Long, BigInteger etc. all implement the Number interface which has a method named intValue. Any other custom types with a numerical aspect should also implement Number (for example: Age implements Number). So you can:
int x = ((Number)yourOb...
What is the difference between -viewWillAppear: and -viewDidAppear:?
...mpact performance in a very visible manner (like animations being delayed, etc).
3) ViewDidAppear: Finally, I use the ViewDidAppear to start off new threads to things that would take a long time to execute, like for example doing a webservice call to get extra data for the form above.The good thing...
What are the differences between struct and class in C++?
...ucts, just like with classes, but people tend not to), no virtual methods, etc. Since languages are as much to communicate with people reading the code as to instruct machines (or else we'd stick with assembly and raw VM opcodes) it's a good idea to stick with that.
...
.keyCode vs. .which
...nly. your event.wich || ... test for falsy (undefined, null, false, 0, '', etc)
– aMarCruz
May 22 '15 at 11:54
@aMarCr...
实战Nginx与PHP（FastCGI）的安装、配置与优化 - 更多技术 - 清泛网 - 专注...
...面指定的安装路径，PHP-FPM的默认配置文件为/usr/local/php/etc/php-fpm.conf。
php-fpm.conf是一个XML格式的纯文本文件，其内容很容易看明白。这里重点介绍几个重要的配置标签：
标签listen_address是配置fastcgi进程监听的IP地址以及端口...
Popstate on page's load in Chrome
... calls to update some results on the page and use history.pushState() in order to update the browser's location bar without page reload. Then, of course, I use window.popstate in order to restore previous state when back-button is clicked.
...
How to use OrderBy with findAll in Spring Data
...StudentEntity, Integer> {
public List<StudentEntity> findAllByOrderByIdAsc();
}
The code above should work. I'm using something similar:
public List<Pilot> findTop10ByOrderByLevelDesc();
It returns 10 rows with the highest level.
IMPORTANT:
Since I've been told that it's eas...
Are there any downsides to passing structs by value in C, rather than passing a pointer?
...cc on x86_64. Anyone is welcome to add other architectures like MSVC, ARM, etc.)
Let's have our example program:
// foo.c
typedef struct
{
double x, y;
} point;
void give_two_doubles(double * x, double * y)
{
*x = 1.0;
*y = 2.0;
}
point give_point()
{
point a = {1.0, 2.0};
r...
What is a vertical tab?
...
Microsoft Word uses VT as a line separator in order to distinguish it from the normal new line function, which is used as a paragraph separator.
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What is the advantage of GCC's __builtin_expect in if else statements?
... ...
after_if:
You can see that the instructions are arranged in such an order that the bar case precedes the foo case (as opposed to the C code). This can utilise the CPU pipeline better, since a jump thrashes the already fetched instructions.
Before the jump is executed, the instructions below ...