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My Lisp

My Lisp is a complete Lisp environment running directly on the iPhone, iPad, and Mac. This
Category Price Seller Device
Developer Tools $3.99 Laurent Rodier iPhone, iPad, iPod

interpreter is true to the original John McCarthy Lisp implementation with the
fundamental 7 operators quote, atom, eq, car, cdr, cons, cond, along with lambda and
label. My Lisp also contains core and mathematical operators borrowed from other Lisp
dialects (Le Lisp, Lisp 1.5, MacLisp, Common Lisp and Scheme to name a few) to make
it easy to learn, program, and most importantly, enjoy Lisp. It also features
built-in functions for advanced mathematics, including complex numbers and numerical
analysis (roots and zeros finder, integral approximation). The complete description
of the fundamental, core, and built-in functions is available using a set of library
functions completely written in My Lisp.

My Lisp offers an interpreter and an editor, all working on the iPhone and iPad, and
most importantly, without requiring any server connection, that is, the interpreter
is executing locally on the iPhone or iPad My Lisp is installed on.

Library and example files contain the source code of classical functions and problems
solved by My Lisp and may be used as reference to learn Lisp and develop other
programs. They include classical puzzles (hanoi and n-queens), basic mathematical
functions (gcd, lcm, factorial, fibonacci, prime?), and the historical apply, mapcar
and maplist functions. The Lambda Calculus example file contains various functions
related to Lambda Calculus and Combinators, with alpha-conversion, beta-reduction,
de Bruijn notations, etc. As a special note, the example file Symbolic Derivation
contains a complete yet extensible symbolic derivation module allowing to compute
the formal derivation of virtually any symbolic function expressed as a Lisp
expression.

A user manual and a reference manual are available from within the application but
also on My Lisp web site (https://lisp.lsrodier.net) and in Apple Books. The complete
source code of the library and example files is part of My Lisp.

Last but not least, this overview couldn’t end without a sample definition of the
notorious REPL function:
(define (REPL eval_me) (REPL (println (eval (read)))))

Reviews

Simply Awesome
jedishrfu

This app is awesome. It’s simple, minimal and easy to use if you know the lisp language. I wish it had graphics capability for games, artwork and charting, sound/ audio capabilities and some interactive capability for screen touch and screen orientation like Pythonista and Codea provide. And access to system functions like the date and time and filesystem. I wish it had a prolog interpreter with lisp source available and an external repository of lisp code like rosettacode.org


Amazing
1tracksystem

I’m in love with this app. The experience of reading the lambda white paper and being able to work through it myself ON MY iPHONE is phenomenal. To any philosophers-in-training out there who are studying “quantitative reasoning,” buy this app now and you can stop asking “what will I use symbolic logic for.” It’s like giving Plato a graphing calculator. Plato’s updated slogan may as well be “let no one know enter philosophy who does not know Lisp.”


Undefined functions
bm_mehran

It’s wast of money since most of functions in Autolisp language is not defined in library of this app . For example setq Getint getpoint and so on . Idk how should i use this app considering this point . Reply to developer : Could you tell me where i would be able to find list of functions in this program ( in order to find equivalent ones to Aulolisp)


Great app. Missing parentheses matching.
Kaysov

A well implemented app with files app integration and a syntax highlighting editor. If only the app had parentheses matching, this app would rock as hell. Love it, none the less.


Get it, use it, you won’t regret it
DarkRadon

Has parens matching now. Keeps getting better and better.


MAJOR FUNCTIONS MISSING
Lidia Monroe

This app is useless. Most functions from common lisp say ‘undefined function’. There isn’t even an array function. Basic functions such as defun are missing. Is there a way to get them in there, and if so how to define them? We don’t know because the ‘help’ tab is also useless.