大约有 11,643 项符合查询结果（耗时：0.0270秒） [XML]
Case objects vs Enumerations in Scala
...xtends Enumeration {
val GBP = Value("GBP")
val EUR = Value("EUR") //etc.
}
Then you can do:
val ccy = Currency.withName("EUR")
This is useful when wishing to persist enumerations (for example, to a database) or create them from data residing in files. However, I find in general that enumer...
How does libuv compare to Boost/ASIO?
..., synchronous and asynchronous file system operations, process management, etc. In contrast, Boost.Asio's original networking focus surfaces, as it provides a richer set of network related capabilities, such as ICMP, SSL, synchronous blocking and non-blocking operations, and higher-level operations...
Convert timestamp to readable date/time PHP
...are using PHP date(), you can use this code to get the date, time, second, etc.
$time = time(); // you have 1299446702 in time
$year = $time/31556926 % 12; // to get year
$week = $time / 604800 % 52; // to get weeks
$hour = $time / 3600 % 24; // to get hours
$minute = $time / 60 ...
(grep) Regex to match non-ASCII characters?
...can use any standard Unix regular expression , like Perl , sed , AWK , etc.
9 Answers
...
Package Manager Console Enable-Migrations CommandNotFoundException only in a specific VS project
...ply re-starting Visual Studio worked for me.
No need to install packages, etc.
share
|
improve this answer
|
follow
|
...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
...常使用ldconfig命令就能解决：
shell> echo "/usr/local/lib" > /etc/ld.so.conf.d/usr_local_lib.conf
shell> ldconfig
再试着启动Nginx看看，应该就OK了。
应用
我们先用一个简单的程序来暖暖场：把下面的代码加入到Nginx的配置文件nginx.conf，并重...
How expensive is RTTI?
...
if (typeid(a) == typeid(b)) {
B* ba = static_cast<B*>(&a);
etc;
}
instead of
B* ba = dynamic_cast<B*>(&a);
if (ba) {
etc;
}
The former involves only one comparison of std::type_info; the latter necessarily involves traversing an inheritance tree plus comparisons.
P...
SQL WHERE condition is not equal to?
...
delete from table where id <> 2
(or variants thereof, not id = 2 etc) will not delete rows where id is NULL.
If you also want to delete rows with id = NULL:
delete from table where id <> 2 or id is NULL
sh...
Disable browsers vertical and horizontal scrollbars
...ing bottom:nnPX will be set nn pixels above the bottom edge of the window, etc.
share
|
improve this answer
|
follow
|
...
List files recursively in Linux CLI with path relative to the current directory
... Use -type f to only return files and not directories, symbolic links, etc.
– user
Nov 22 '16 at 7:11
2
...