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Updating packages in Emacs
...resh-contents unconditionally tries to download a package list from all repos you've added to package-archives; package-archive-contents is non nil if you have already downloaded the package list.
ELPA is the original. I don't think it's really maintained anymore, but I'm not sure. I don't use it....
Difference between sh and bash
...or the Shell Command Language) is a programming language described by the POSIX
standard.
It has many implementations (ksh88, dash, ...). bash can also be
considered an implementation of sh (see below).
Because sh is a specification, not an implementation, /bin/sh is a symlink
(or a hard link) to a...
Just what is Java EE really? [closed]
...nction outside of the application server environment?
Actually they can. Most of the libraries can be directly used standalone (in Java SE) or included in a .war (practically that's nearly always Tomcat). Some parts of Java EE, like JPA, have explicit sections in their respective specifications tha...
How exactly does CMake work?
...ed files do.
CMake introduces a lot of complexity into the build system, most of which only pays off if you use it for building complex software projects.
The good news is that CMake does a good job of keeping a lot of this messiness away from you: Use out-of-source builds and you don't even have ...
Difference between DateTime and Time in Ruby
...DateTime and Time classes in Ruby and what factors would cause me to choose one or the other?
7 Answers
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What is Cache-Control: private?
...8 GMT
The server receives the request, realizes that the client has the most recent version already. Rather than sending the client 200 OK, followed by the contents of the page, instead it tells you that your cached version is good:
304 Not Modified
Your browser did have to suffer the delay of ...
Framework vs. Toolkit vs. Library [duplicate]
...
The most important difference, and in fact the defining difference between a library and a framework is Inversion of Control.
What does this mean? Well, it means that when you call a library, you are in control. But with a framew...
实战Nginx与PHP（FastCGI）的安装、配置与优化 - 更多技术 - 清泛网 - 专注...
...器的结果返回给客户端，这在很大程度上提高了整个应用系统的性能。
二、Nginx+FastCGI运行原理
Nginx不支持对外部程序的直接调用或者解析，所有的外部程序（包括PHP）必须通过FastCGI接口来调用。FastCGI接口在Linux下是socket，（...
What's the difference between UTF-8 and UTF-8 without BOM?
...t files as file system metadata would be a better way to preserve it. But most of us living in the real world can't change the file system of the OS(s) our programs get run on -- so using the Unicode standard's platform-independent BOM signature seems like the best and most practical alternative IMH...
overlay two images in android to set an imageview
... android:left, android:right, android:top and android:down to control the position of one of the layers in the .xml file.
– zabawaba99
Oct 24 '12 at 3:44
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