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一体化的Linux系统性能和使用活动监控工具–Sysstat - 更多技术 - 清泛网 -...
...ix 选项配置了“/usr”内容。
# yum remove sysstat [On RedHat based System]
# apt-get remove sysstat [On Debian based System]
# ./configure --prefix=/usr
# make
# make install
现在，使用相同的“”mpstat命令和“-V”选项再一次确认更新的版本。
# mpsta...
优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛，有思想、有深度
...;$n = mt_rand(0, PHP_INT_MAX);
$m = base_convert($m, 10, 36); // 主随机
$n = base_convert($n, 10, 36); // 辅随机
$r = substr($m . $n, 0, 16);
...
Nohup is not writing log to output file
...
python as well as other C stdio-based programs uses line-buffering in interactive case (stdout is connected to a tty) and block-buffering when redirected to a file. If python -u doesn't work; nohup might have introduced its own buffering.
...
What is the gain from declaring a method as static
...inally better at most, since the code does not need to do dynamic dispatch based on the type.
However, a much stronger argument against refactoring into static methods is that currently using static is considered bad practice. Static methods / variables do not integrate well into an object oriente...
Why does sun.misc.Unsafe exist, and how can it be used in the real world?
...tiated by sun.misc.Unsafe, useful for instrumentation
sun.misc.Unsafe.arrayBaseOffset and arrayIndexScale can be used to develop arraylets,a technique for efficiently breaking up large arrays into smaller objects to limit the real-time cost of scan, update or move operations on large objects
http://...
What should every JavaScript programmer know? [closed]
...ss/instance system you actually wanted; when you might want to use closure-based objects instead of prototyping. (Most JS tutorial material is absolutely terrible on this; it took me years to get it straight in my head.)
How this is determined at call-time, not bound; how consequently method-passing...
Null or default comparison of generic argument in C#
...ify its own custom overload. The compiler determines which overload to use based on the static type of the variable (the determination is not polymorphic). Therefore, if you change your example to constrain the generic type parameter T to a non-sealed reference type (such as Exception), the compiler...
When to use IList and when to use List
...
It's always best to use the lowest base type possible. This gives the implementer of your interface, or consumer of your method, the opportunity to use whatever they like behind the scenes.
For collections you should aim to use IEnumerable where possible. Thi...
PHP Multidimensional Array Searching (Find key by specific value)
...
Another poossible solution is based on the array_search() function. You need to use PHP 5.5.0 or higher.
Example
$userdb=Array
(
(0) => Array
(
(uid) => '100',
(name) => 'Sandra Shush',
(url) => 'urlof100'
),...
How to POST raw whole JSON in the body of a Retrofit request?
...s:2.3.0'
Your Interface
public interface ApiInterface {
String URL_BASE = "http://10.157.102.22/rest/";
@Headers("Content-Type: application/json")
@POST("login")
Call<User> getUser(@Body String body);
}
Activity
public class SampleActivity extends AppCompatActivity ...