大约有 7,000 项符合查询结果(耗时:0.0216秒) [XML]
Regular expression for letters, numbers and - _
...et to show how you can use this pattern:
<?php
$arr = array(
'screen123.css',
'screen-new-file.css',
'screen_new.js',
'screen new file.css'
);
foreach ($arr as $s) {
if (preg_match('/^[\w.-]*$/', $s)) {
print "$s is a match\n";
} else {
print "$s is NO match!!!\n";
};
}
...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...模式可以不必在请求到来时再产生新的进程,从而减小了系统开销以增加性能。
MaxSpareServers设置了最大的空闲进程数,如果空闲进程数大于这个值,Apache会自动kill掉一些多余进程。这个值不要设得过大,但如果设的值比M...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛,有思想、有深度
...cre //查询系统中有没有安装PCRE,一般装系统是默认装有,所以我们要删掉系统自带的
#cp /lib/libpcre.so.0 / //在删除系统自带的PCRE之前,要先备...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是32766,要查询的路由表名称是main,后面依此类推。
3、操作系统在选路时首先根据路由规则选取table,然后再从table里选取相应路由,如果同一table里不同接口使用相同的网关,选路时会默认选择第一条路由
,所以当有两个网...
Code Golf: Collatz Conjecture
...ut by passing a number to it on the command line:
;
; >> $ ./collatz 123
; >> 123 --> 370 --> 185 --> 556 --> 278 --> 139 --> 418 --> 209 --> 628 --> 314
; >> --> 157 --> 472 --> 236 --> 118 --> 59 --> 178 --> 89 --> 268 --> 134...
Convert Rows to columns using 'Pivot' in SQL Server
..., 212),
(105, 2, 78),
(109, 2, 97),
(105, 3, 60),
(102, 3, 123),
(101, 3, 220),
(109, 3, 87);
If your values are known, then you will hard-code the query:
select *
from
(
select store, week, xCount
from yt
) src
pivot
(
sum(xcount)
for week in ([1], [2], [3])
) pi...
MFC 中CImageList的用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...立和删除图像,并能实现增加、删除、替换和拖动图像邓操作。图像列表控件提供了控制图像列表额基本方法,这些方法在Windows 95及以后版本才能实现。该控件是不可见的,通常与其他如CListBox、CComboBox、CComboBoxEx以及CTabCtrl一...
窝窝与众美联合并 新公司命名“众美窝窝” - 资讯 - 清泛网 - 专注C/C++及内核技术
...CEO徐茂栋曾透露,去年Q3窝窝改进了面向商家的窝窝电商操作系统,为餐饮行业推出“定制化”的操作后台,使商家可以一站式创建并管理自有品牌的APP、窝窝专卖店,以及第三方互联网渠道上的店铺(微信微店,支付宝服务窗,...
How to use hex color values
...
How would you handle 123ABC? The compiler is burking at it not being a digit.
– Islam Q.
Mar 2 '16 at 6:28
1
...
Understanding :source option of has_one/has_many through of Rails
...'ve chosen to namespace the Dog::Breed, because we want to access Dog.find(123).breeds as a nice and convenient association.
Now, if we now want to create a has_many :dog_breeds, :through => :dogs association on Pet, we suddenly have a problem. Rails won't be able to find a :dog_breeds associati...