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Invalid argument supplied for foreach()
...ay. Use isset() or is_array() or both, entirely depending on your scenario etc.
– James
Jul 22 '16 at 13:26
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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...储、高可扩展性和高可用性这些难题。不过就是因为这些问题Nosql诞生了。
NOSQL有这些优势：
大数据量，可以通过廉价服务器存储大量的数据，轻松摆脱传统mysql单表存储量级限制。
高扩展性，Nosql去掉了关系数据库的关系型...
Nginx与Lua - 更多技术 - 清泛网 - 专注C/C++及内核技术
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shell> ldd /path/to/nginx
libluajit-<VERSION>.so => not found
此类问题通常使用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...
CSS background opacity with rgba not working in IE 8
...deserve to be punished by not seeing border radius, transparent background etc.
– Evgeny
Jul 10 '13 at 20:16
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How should a model be structured in MVC? [closed]
...naware of storage - neither from where (SQL database, REST API, text file, etc.) nor even if they get saved or retrieved.
Data Mappers
These objects are only responsible for the storage. If you store information in a database, this would be where the SQL lives. Or maybe you use an XML file to store...
Difference between \w and \b regular expression meta characters
...ren't word characters include whitespace, beginning and end of the string, etc.)
\w matches a, b, c, d, e, and f in "abc def"
\b matches the (zero-width) position before a, after c, before d, and after f in "abc def"
See: http://www.regular-expressions.info/reference.html/
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是为了避免不必要的拷贝。使拷贝动作高效并且防止剥离问题发生的一个简单办法是使容器包含指针而不是对象。
第4条：调用empty而不是检查size()是否为0。
理由很简单：empty对所有的标准容器都是常数时间操作，而对...
Why should I use version control? [closed]
...ou probably know by now), you can use any distributed VCS (git, mercurial, etc) locally, without a server. You could also use a centralised VCS (CVS, SVN, etc.) locally, but it'd be much more annoying to set up, and wouldn't provide much benefit. Regardless of the VCS you use, you can have it on a s...
项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...
... Tools】发布后，根据大家的回复，我需要向大家说明几个问题：1 为什么要 在第一篇文章 项目管理实践教程一、工欲善其事，必先利其器【Basic Tools】发布后，根据大家的回复，我需要向大家说明几个问题：
1.为什么要用Visual...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...le? It could also be > emptyfile.c or : > emptyfile.c or dd if=/etc/passwd of=emptyfile.c count=0 or …
– Jonathan Leffler
Oct 10 '13 at 14:07
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