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如何高效的学习掌握新技术 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...编程生涯这些年，2001年开始学习Asp，2002年学习Javascript，2003年学习Asp.Net/C#，2009年学习Objective-C，2013年又跳到前端这个大坑，从Nodejs到 jQuery到 Angularjs到现在的 React。这一路学来，走过一些弯路，也积累了不少学习的经验。
积...
关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ket_select 选择
self::$connections[$i] = $newconn;
// 输入的连接资源缓存容器
$writefds[$i] = $newconn;
// 连接不正常
if ($reject) {
socket_write($writefds[$i], $reject);
unset($writefds[$i]);
self::close($i);
} else {
echo "Client $i come./n";
}
// remove th...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...BLE属于无线通信，则其通信介质是一定频率范围下的频带资源（Frequency Band）；
BLE的市场定位是个体和民用，因此使用免费的ISM频段（频率范围是2.400-2.4835 GHz）；
为了同时支持多个设备，将整个频带分为40份，每份的带宽为2MH...
System.Security.SecurityException when writing to Event Log
I’m working on trying to port an ASP.NET app from Server 2003 (and IIS6) to Server 2008 (IIS7).
22 Answers
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Sleeping in a batch file
...
SLEEP.exe is included in most Resource Kits e.g. The Windows Server 2003 Resource Kit which can be installed on Windows XP too.
Usage: sleep time-to-sleep-in-seconds
sleep [-m] time-to-sleep-in-milliseconds
sleep [-c] commited-memory ratio (1%-100%)
...
Do threads have a distinct heap?
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By default C, and C++, don't have multiple threads. The 2003 c++ specification at least makes no allowances for threads in its virtual machine design, so threads, in c++, are implementation defined.
– Chris Becke
Nov 3 '09 at 9:32
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Get selected element's outer HTML
...ternet Explorer 4.0...Released 1997
Opera 7 ......................Released 2003-01-28
Safari 1.3 ...................Released 2006-01-12
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REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...x = 1048586
# /sbin/sysctl -p (设置参数立即生效)
9、修改系统资源限制
编辑系统资源限制配置文件 vim /etc/security/limits.conf，在该文件下添加如下行：
# vim /etc/security/limits.conf
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
...
IE8 support for CSS Media Query
... on iPad, or android tablets. IE8 could be use on XP/Vista PCs mostly from 2003 to 2009, screens mainly around 1024px wide. Windows Mobile is under IE6, and Windows Pone under IE9+. The true question here is to ask yourself if making responsive for IE8 is really useful ?
– Greg...
How to strip all whitespace from string
...ort re
>>> re.sub(r'\s+', '', 'strip my \n\t\r ASCII and \u00A0 \u2003 Unicode spaces')
'stripmyASCIIandUnicodespaces'
>>> # Or, depending on the situation:
>>> re.sub(r'(\s|\u180B|\u200B|\u200C|\u200D|\u2060|\uFEFF)+', '', \
... '\uFEFF\t\t\t strip all \u000A kinds of \u2...