Mac OS X Leopard - ARCAism

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CHAPTER 18 INTRODUCING DARWIN AND THE SHELL
Table 18-5. Continued
Keystroke Action
Saving and Quitting
:w [filename] Save file as filename (if no file name is specified, the file will be saved with the
current name)
:q Quit Vim
:x, :wq or ZZ Save file and quit
:w! Force save read-only file (if you have proper permissions)
:q! Force quit changed file without saving
Other Commands
Esc Return Vim to command mode
u Undo
J Join two lines into one
:.= Display current line number
Emacs
Emacs (or “GNU Emacs,” as the faithful like to refer to it) is another popular text editor (perhaps
it may be best described as a powerful runtime system with text editing capabilities). Emacs
can do wonderful things provided you take the time to learn a rather large number of mystical
key combinations (and learning a little Lisp helps too). In fact, people who love and use Emacs
(who really should have a name to describe them—like “Trekkies” or something—since they
tend to share the same sort of devotion) won’t settle for anything less.
Unlike Vi, Emacs is a single-mode text editor; so, in that way, it’s probably similar to most
GUI text editors you may have used. However, since it lacks a GUI, you can’t use your mouse to
access the fancy features. That’s where the crazy keystrokes come into play. In general, these keystrokes
take the form of either the Ctrl key or the Meta key plus some other key (in Emacs, the
shorthand for this would be something like C-k for Ctrl+K, or M-k for Meta+K). Usually, you
would hold these keys at the same time. The gotcha here is that the Mac keyboard doesn’t have
a Meta key. You can fix this by selecting the “Use option as meta key” option in Terminal’s Settings
preferences (on the Keyboard tab, as shown in Figure 18-2).