Emacs的好处

Emacs has both non-modal interface (by default) and modal one (e.g. it can emulate vim and vi through Evil, Viper, or Vimpulse). One of the most ported computer programs. It runs in text mode and under graphical user interfaces on a wide variety of operating systems, including most Unix-like systems (Linux, the various BSDs, Solaris, AIX, IRIX, macOSetc.), MS-DOS, Microsoft Windows, AmigaOS, and OpenVMS. Unix systems, both free and proprietary, frequently provide Emacs bundled with the operating system. Emacs server architecture allows multiple clients to attach to the same Emacs instance and share the buffer list, kill ring, undo history and other state. Pervasive online help system with keybindings, functions and commands documented on the fly. Extensible and customizable Lisp programming language variant (Emacs Lisp), with features that include: A powerful and extensible file manager (dired), integrated debugger, and a large set of development and other tools. Having every command be an Emacs Lisp function enables commands to DWIM (Do What I Mean) by programmatically responding to past actions and document state. For example, a switch-or-split-window command could switch to another window if one exists, or create one if needed. This cuts down on the number of keystrokes and commands a user must remember. "An OS inside an OS". Emacs Lisp enables Emacs to be programmed far beyond editing features. Even a base install contains several dozen applications, including two web browsers, news readers, several mail agents, four IRC clients, a version of ELIZA, and a variety of games. All of these applications are available anywhere Emacs runs, with the same user interface and functionality. Starting with version 24, Emacs includes a package manager, making it easy to install additional applications including alternate web browsers, EMMS (Emacs Multimedia System), and more. Also available are numerous packages for programming, including some targeted at specific language/library combinations or coding styles.

vi类编辑器的好处

Edit commands are composable Vi has a modal interface (which Emacs can emulate) Historically, vi loads faster than Emacs. While deeply associated with UNIX tradition, it runs on all systems that can implement the standard C library, including UNIX, Linux, AmigaOS, DOS, Windows, Mac, BeOS, OpenVMS, IRIX, AIX, HP-UX, BSD and POSIX-compliant systems. Extensible and customizable through Vim script or APIs for interpreted languages such as Python, Ruby, Perl, and Lua Ubiquitous. Essentially all Unix and Unix-like systems come with vi (or a variant) built-in. Vi (and ex, but not vim) is specified in the POSIX standard. System rescue environments, embedded systems (notably those with busybox) and other constrained environments often include vi, but not emacs.

来源:https://en.wikipedia.org/wiki/Editor_war

如果您经常从一个站点移动到另一个站点，或者您的工作涉及到登录到生产系统，那么vim就是合适的选择。

默认情况下，所有*nix机器都会安装vi。

大多数sysdamins更喜欢ksh作为默认shell。KSH使用vi(或emacs)命令击键来搜索历史记录并编辑命令行。

如果你不太了解vi，当你登录到一个标准配置的unix机器上时，你就会受到严重的限制。

仅仅因为这个原因，我推荐vim作为你日常的编辑器。我曾经见过emacs爱好者试图在一个基本的unix服务器上修改配置文件。

对我来说，emacs的优点是，

tramp模式允许您通过ssh编辑远程文件。就像本地文件一样。 Tramp-mode + dired =全功能SFTP客户端 支持您需要的所有语言。 内置的终端模拟器(术语模式)，所以我可以继续编码，而无需在应用程序之间切换。 可扩展性任何你不喜欢的东西都可以用lisp来改变。

我是Emacs的粉丝，但我鼓励其他开发人员学习VI，因为:

你可以使用VI编辑emacs的makefile文件。 VI包含ed命令，每个UNIX用户都应该知道ed和sed。

我注意到一些关于VIM启动速度比emacs快的评论。如果您真的关心这个问题，请在服务器模式下运行emacs，并将“emacs”别名为“emacsclient”。客户端速度非常快，因为它所做的一切都是轻拍服务器的肩膀，告诉它你想编辑哪个文件。在MacOSX上，emacsclient只有33K，而emacs是287M。

我不确定这些在现代硬件上是否有必要。在我的MacBook Pro (2013 Retina)上，当我从shell运行emacs时，它几乎是立即加载的。我丝毫没有察觉到停顿。当我运行Emacs时。app (GUI版本)可能需要3秒。

我听到的大多数关于emacs的抱怨似乎都来自那些对emacs不了解的人。我从1982年就开始使用vi和emacs了，我清楚地记得，在我早期的UNIX机器中，emacs加载速度比vi慢得多，并且占用了大部分物理内存，但现在已经不再是这样了，至少15-20年都没有了。

我承认的一个抱怨是“emacs小指”。在我年轻的时候，这从来没有困扰过我。现在我已经58岁了，我的小手指确实因为反复使用Control键进行emacs和弦而有点酸痛。在MacBook Pro的键盘上尤其如此，“控制”键向右移动了一个位置，为“fn”键腾出空间。当Control是左下角的键时，它几乎没有那么烦人。

击键执行::: Vi编辑将保留键入键的每个排列。这将在决策树中创建一个路径，该路径明确地标识任何命令，而Emacs命令是立即执行的键入键的组合，使用户可以选择是否使用命令。

内存使用和可定制性::: vi是一个更小更快的程序，自定义能力更有限，而Emacs启动时间更长，需要更多内存。然而，它是高度可定制的，并且包含大量的特性，因为它本质上是为文本编辑而设计的Lisp程序的执行环境。

我想引用《UNIX编程的艺术》一书中的一段话:

Many people who regularly use both vi and Emacs tend to use them for different things, and find it valuable to know both. In general, vi is best for small jobs – quick replies to mail, simple tweaks to system configuration, and the like. It is especially useful when you’re using a new system (or a remote one over a network) and don’t have your Emacs customization files handy. Emacs comes into its own for extended editing sessions in which you have to handle complex tasks, modify multiple files, and use results from other programs during the session. For programmers using X on their console (which is typical on modern Unixes), it’s normal to start up Emacs shortly after login time in a large window and leave it running forever, possibly visiting dozens of files and even running programs in multiple Emacs subwindows.

我在这里真正想强调的是:“许多人发现两者都知道是有价值的。