This was inspired by Lisp-In-Perl and my slight disappointment in both it and perl-lisp on CPAN. I've come up with my own implementation of Lisp-like linked-lists and functions/methods, so I could do what neither of the other lisps could, namely:
(defun transpose (x) (apply 'mapcar (cons 'list x))

Which on this input:
(transpose '((1 2 3) (4 5 6) (7 8 9) (10 11 12)))
Should product this output:
((1 4 7 10) (2 5 8 11) (3 6 9 12))

[download]
The perl version of this (which currently works!) goes like this: 
use LISP qw(cons);

# Create linked list (Not an array!)
my $list = LISP->new([[1,2,3,4],[5,6,7,8],[9,10,11,12]]);
print $list->string; # Prints ((1 2 3 4) (5 6 7 8) (9 10 11 12))
my $mapcarf = LISP->new(\&LISP::Lambda::mapcar);
my $listf   = LISP->new($list->can('list'));
# We probably ought to go for closure on mapcarf and listf
# But this is OK for now
my $transpose = sub {$mapcarf->apply(cons($listf, shift))};
$list=$transpose->($list);
print $list->string;   # Prints ((1 5 9) (2 6 10) (3 7 11) (4 8 12))
$list=$transpose->($list);
print $list->string;   # Prints ((1 2 3 4) (5 6 7 8) (9 10 11 12))

[download]
It's only a matter of time before I get a full-blown lisp2perl compiler (I think). I'm looking for input on what I've got so far. Shall I post the whole thing(about 600 lines) or just upload it to CPAN?

In reply to More Lisp-In-Perl by runrig

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.