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Published byElfreda Joseph Modified over 9 years ago
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EMACS Jim Vallino Proud emacs user since 1979
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The truth about editors Editors are like religions. Everyone has one that they like.
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What does emacs stand for? Editor MACroS Eight Megs And Constantly Swapping EMACS Makes A Computer Slow EMACS Makes All Computing Simple EMACS May Allow Customized Screwups Escape Meta Alt Control Shift Eventually Malloc()s All Computer Storage Extensible Macro System
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How long has emacs been around? Many variants have been developed I first used it at Bell Labs in 1979 Current favorites GNU Emacs XEmacs
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How do you use emacs? Start it and use it Current versions have menu interface so you do not have to remember lots of (any?) key sequences Ctrl-G terminates any command You will quickly customize it to your liking
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Customizing emacs Under the hood emacs is run by elisp Standard emacs library has elisp code to do just about everything Including vip-mode for the “must have vi” crowd ~/.emacs executed on startup to configure editor to your liking Hack your way into a stupor writing elisp functions
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Can you do X in emacs? Yes! You may have to write some elisp code to get it to work though.
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Typical things done in.emacs Fix braindead defaults for Ctrl-H and delete (global-set-key "\C-h" 'delete-backward-char) (global-set-key [delete] 'delete-char) (global-set-key "\M-h" 'help-command) Set path to personal elisp library (defvar emacslib (expand-file-name "~/lib/emacs") Set screen colors (set-background-color "black") (set-foreground-color "white") (set-cursor-color "white") Trigger modes (setq auto-mode-alist (cons '("\\.txt\\'". indented-text-mode) auto-mode-alist))
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More in.emacs Load your personal keybindings Custom-set-variables controlled from within emacs
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Searching Standard Incremental Regular expression
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Emacs modes Always editing in some “mode” Mode usually based on file extension Can set manually Force in file: -*- Perl -*- Name your favorite language there’s probably a mode for it
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What do you get with a mode? Set of local key bindings Some come transparently like auto indent Templates Syntax sensitive indenting Abbreviations Compilation commands Hook function to run when mode is loaded Customizing a mode
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Version control RCS and CVS builtin Register file initially Check in/out Add revision coments Compare revisions
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Help system Ctrl-H is default keybinding Operation available a – apropos b – key bindings c, k – describe key sequence f – describe function i – info command m – describe mode v – describe variable w – where is command bound
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Emacs terms Buffer – holds a file being edited; may or may not be visible Window – a display region for a file Frame – an Emacs “window” managed by the local windowing toolkit; may contain multiple windows Multiple frames are allowed Mark – a remembered hidden location Point – current location of cursor
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Miscellaneous modes Directory Shell Vip If you can’t live without vi you can live with emacs with vip-mode Full functionality of vi and ex
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What good is vi? It’s available on every Unix system. It starts in an instant
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What’s the difference between emacs and vi? The difference between emacs and vi is like the difference between making love and masturbation. That is to say: vi will always be there when you need it. -- signature for Patrick Dockhorn, patsch@ubka.uni-karlsruhe.de
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