CSCE476-876 Introduction to Artificial Intelligence

CSCE476/876: Introducation to Artificial Intelligence, Spring 2001

EMACS: Command Commands for Emacs and/or for LISP-mode
(This is not an exhaustive list)

ESC-Control-q	Indents correctly the lisp expression located at the cursor. (*very* useful)
ESC-Control-x	Compile a lisp expression in an emacs buffer.
Control-x Control-f	Loads a file in an emacs buffer. (Use TAB or SPACE for completion.)
Control-u Control-c Control-b	Compiles all lisp expressions in a buffer.
Control-g	Breaks a command in emacs.
Control-]	Breaks a recursive-edit loop in emacs.
Control-x Control-s	Saves an emacs buffer into the corresponding file.
Control-x k	Kills an emacs buffer.
Control-x control-b	Lists all emacs buffers.
Control-x 2	Horizontally splits an emacs buffer into two areas.
Control-x 3	Vertically splits an emacs buffer into two areas.
Control-x o	Moves the cursor from one emacs buffer to another one.
Control-x 1	Replaces currently displayed buffers by one buffer, the one where the cursor is currently.
Control-h a	Help (apropos) for emacs commands. A buffer is displayed listing all emacs commands containing the entered string.
Control-h f	Help (function) for arguments of an emacs function.
Control-x Control-c	To exit emacs.
ESC-Control-f / ESC-Control-b	Advances a full lisp expression / Goes back a full lisp expression.
Control-c Control-p	In a common-lisp buffer, brings back (recursively) the previously evaluated lisp expression.
Control-c Control-n	Usually used during a sequence of `Control-c Control-p's. In a common-lisp buffer, brings back (recursively) the next evaluated lisp expression.
Control-c ;	Comments a selected region in a buffer containing a lisp file (lisp comment mode)
ESC-- Control-c ;	Removes comments from the selected region (lisp comment mode)
ESC-<spacebar>	Eliminates extra empty space between two words (leaving just one space)
Control-Shift-_ (i.e., pressing simultaneously the 3 buttons: Control, Shift, and -)	Recursive undo (*very* useful in Emacs)

Composer environment:

Step, trace, and inspect are functions of Common Lisp, and available on any CL implementation. Check LWH: Chapter 10.
Composer is an enhanced environment for LISP code development that comes with Allegro Common Lisp of Franz Inc. It has a window-based inspector, debugger, on-line documentation, profiler, xreference, etc.
Warning: Sometimes, X windows does not allow Composer to open its interactive windows (must be a bug), and one needs to type "xhost+" in an xterm before starting xemacs, ACL, composer, etc.
To load composer, when your ACL image contains composer, type in a *common-lisp* buffer: (require 'composer).
Then type (composer:start-composer) (alternatively, you can start composer from the menu buttons on top of your xemacs window.)
To inspect a variable var, you can type :wi var (this stands for `window inspect var').
To enter the debugger (once you are in a break loop because of the some bug), you can type :wde, and a window will appear with the last instructions.

Berthe Y. Choueiry

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