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Message from discussion Lisp for ANN programming
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Daniel Rupis  
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 More options Nov 15 2012, 5:25 am
Newsgroups: comp.lang.lisp
From: Daniel Rupis <danielrupistraliza...@yahoo.es>
Date: Thu, 15 Nov 2012 02:25:33 -0800 (PST)
Local: Thurs, Nov 15 2012 5:25 am
Subject: Re: Lisp for ANN programming
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 WJ  said

> (def zeros (take 10 (repeat 0)))

> (map-indexed #(if (zero? (mod (inc %1) 3)) (inc %2) %2) zeros)

> --> (0 0 1 0 0 1 0 0 1 0)

A trivial translation follows. Since it seems that you have plenty of time available for playing with clojure and common-lisp, what about developing a library that implements clojure in common lisp?

(map-indexed ($(i x) (if (zerop (mod (1+ i) 3)) (1+  x) x)) zeros)

given the following definitions:

(defun map-indexed (fun list)
 (let ((i 0))
   (mapcar (lambda(x) (prog1 (funcall fun i x) (incf i))) list)))

(defun repeat (times val)
  (loop repeat times collect val))

(defparameter zeros (repeat 10 0))

(defmacro $ (vars &rest body)
  `(lambda ,vars ,@body))


 
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