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Re: How to improve the readability of (any) LISP or any highlevelfunctio
From: |
WJ |
Subject: |
Re: How to improve the readability of (any) LISP or any highlevelfunctional language to the level of FORTH ? |
Date: |
9 Jan 2011 10:41:05 GMT |
User-agent: |
XanaNews/1.18.1.6 |
w_a_x_man wrote:
> On Jan 1, 5:56 pm, The Quiet Center <thequietcen...@gmail.com> wrote:
>
> > How would you code this simple list compression problem in Ruby:
> >
> > 1.08 (**) Eliminate consecutive duplicates of list elements.
> > If a list contains repeated elements they should be replaced
> > with a single copy of the element. The order of the elements should
> > not be changed.
> >
> > Example:
> > ?- compress([a,a,a,a,b,c,c,a,a,d,e,e,e,e],X).
> > X = [a,b,c,a,d,e]
>
>
>
> (defun compress (stuff)
> (mapcon #'(lambda (x)
> (if (and (> (length x) 1) (eql (car x) (cadr x)))
> nil
> (list (car x))))
> stuff))
MAPCON works quite well for this.
Tweeked:
(defun compress (stuff)
(mapcon #'(lambda (x)
(if (and (rest x) (eql (first x) (second x)))
nil
(list (first x))))
stuff))
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, (continued)
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Nathan, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Paul Rubin, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, LanX, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Jerome Baum, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Paul Rubin, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, w_a_x_man, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, w_a_x_man, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, LanX, 2011/01/03
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Frank GOENNINGER, 2011/01/02
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, w_a_x_man, 2011/01/07
- Re: How to improve the readability of (any) LISP or any highlevelfunctional language to the level of FORTH ?,
WJ <=
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Didier Verna, 2011/01/03
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Harig, 2011/01/03
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, rusi, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, D Herring, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Harig, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Bradshaw, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Harig, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Bradshaw, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tim Harig, 2011/01/04
- Re: How to improve the readability of (any) LISP or any highlevel functional language to the level of FORTH ?, Tamas K Papp, 2011/01/04