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迅雷发布无限节点CDN 每GB仅0.1元 - 资讯 - 清泛网 - 专注C/C++及内核技术
...有全锅端。CDN不一样，我要迁一个CDN十分钟就迁了，传传文件改改配置就过去了。所以CDN对于云厂商来说是整个服务体系里最没有黏性的。
问：我们新推出的CDN服务和市场上已有的厂商市场定位区别到底在哪里？我觉得简单的...
企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可用性。
解决这个问题的方法要根据负载平衡服务器的类型来讨论。对于L3/4负载平衡服务器而言，为了能够让整个系统不失效，业界中的常用方法是在系统中使用一对负载平衡服务器。当其中一个负载平衡服务器失效的时候，...
从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的使用。这些系统中的工具支持大部分教学中的特征 ,如文件共享、讨论、任务 ,以及与教学信息系统的整合。
另一方面 ,大型多人在线游戏 (Massively Multip layer Online Games,MMOG)也逐渐变为大众游戏 ,吸引了越来越多的关注。现在...
Confused by python file mode “w+”
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Let's say you're opening the file with a with statement like you should be. Then you'd do something like this to read from your file:
with open('somefile.txt', 'w+') as f:
# Note that f has now been truncated to 0 bytes, so you'll only
# be able...
How to [recursively] Zip a directory in PHP?
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Here is a simple function that can compress any file or directory recursively, only needs the zip extension to be loaded.
function Zip($source, $destination)
{
if (!extension_loaded('zip') || !file_exists($source)) {
return false;
}
$zip = new ZipArch...
How can I check if a file exists in Perl?
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Test whether something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that path, but it will also fire for ...
Multiple file upload in php
I want to upload multiple files and store them in a folder and get the path and store it in the database... Any good example you looked for doing multiple file upload...
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How to search file text for a pattern and replace it with a given value
I'm looking for a script to search a file (or list of files) for a pattern and, if found, replace that pattern with a given value.
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How do I use extern to share variables between source files?
... of relevance when the program you're building
consists of multiple source files linked together, where some of the
variables defined, for example, in source file file1.c need to be
referenced in other source files, such as file2.c.
It is important to understand the difference between defining a
var...
What are file descriptors, explained in simple terms?
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In simple words, when you open a file, the operating system creates an entry to represent that file and store the information about that opened file. So if there are 100 files opened in your OS then there will be 100 entries in OS (somewhere in kernel). Thes...