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diff --git a/software/scheme b/software/scheme deleted file mode 100644 index dda68f1..0000000 --- a/software/scheme +++ /dev/null @@ -1,85 +0,0 @@ -================== -Scheme -================== - -``mit-scheme`` with the ``scmutils`` package is assumed; the command -``mechanics`` starts in interactive edwin prompt. - -See also notes on `The Little Schemer </k/books/littleschemer/>`__. - -Scheme Implementations ------------------------ -Very partial list, mostly just the ones which are interesting to me. -Alexey Radul maintains a nice table of R5RS implementation details in various -packages on his `website <http://web.mit.edu/~axch/www/scheme/choices.html>`__. - -MIT/GNU Scheme - The 7.9.0 release (last stable as of 01/01/2009) is not R5RS compatible, - and is generally a pain in the ass to compile on new systems. The 9.0 - release should be easier to compile and distribute because it will use - a C compiler to bootstrap (true?). - -SCM - SCM is a fairly minimal, very small footprint R5RS-compatible - implementation. Apparently very portable and easy to compile. Includes - the Hobbit compiler. Part of the GNU project, maintained at MIT? - -SIOD - SIOD (scheme in one day) is a super small (75k binary?) Scheme - implementation. - -Coding in ``edwin`` ------------------------ - -..note: this section should be spun off as emacs. edwin is essentially a - scheme version of emacs. See this - `emacs cheatsheet <http://static.bnewbold.net/mirror/sheets/emacs.pdf>`__ - -Common keyboard commands (usually 'M' is alt button, 'C' is ctrl, and 'S' is -meta/super/"windows"): - -========= ==================================================================== -C-x C-f Open a file, or create a new one -C-x C-s Save the file -C-x k Kill (close) a buffer -C-x C-c Exit the editor -C-g Abort a command -C-x C-e Evaluate the previous expression -M-z Evaluate the surrounding expression -M-o Evaluate the entire buffer (everything) -C-c C-c Kill evaluation after an error -C-y Paste (yank) -C-x 2 Split screen vertically -C-x 5 Split screen horizontally -C-x o Switch to next buffer window -C-x 1 Return to non-split screen -M-x Enter a command by name in minibuffer (use tab to complete) -C-x C-b Show buffer menu -C-x b Select buffer -C-x u Undo -C-y Paste -========= ==================================================================== - -Command in ``.edwin`` to set Super-TAB to autocomplete scheme variables:: - - (define-key 'Scheme #\s-tab 'scheme-complete-variable) - -Scope --------------- -``set!`` looks up a symbol name and permanently changes the first value it comes -across. ``let`` (and ``letrec``) create a new symbol with the given value. -But wait, you need a ``lambda`` block to make everything work? - -Environment/Interpreter Commands ------------------------------------ -``(disk-save filename)`` will save a binary microcode image; an existing -image can be specified with the ``--band`` option at runtime or with -``(disk-restore filename)`` from within the interpreter. Bands are also called -worlds. - -"First Class" ------------------- -"Procedures as first class objects" is one of the features commonly attributed -to scheme. What does that mean? SICP describes first class objects as those -that can be: named by variables, passed as arguments, returned as results, -and included in data structures. |