A friend of mine, EnragedTux, wrote a BF interpreter in Perl. He wanted to shorten it up, and I came up with this. He told me to say that he helped out. :) 
#!/usr/bin/perl
open P,shift;%p=('>',sub{$p++},'<',sub{$p--},'+',sub{$p[$p]++},'-',
sub{$p[$p]--},'.',sub{print chr$p[$p]},',',sub{$p[$p]=ord getc},'['
,sub{&c} ,);sub p{ exists$p{$_[0]}&&&{$p{$_[0]}}}p getc P until eof
P; sub c{push@c,getc P until$c[@c-1]eq']';do{p$_ for@c}while$p[$p]}

[download]
"If you go on with this nuclear arms race, all you are going to do is make the rubble bounce" -- Winston Churchill

In reply to BF interpreter by gustavderdrache

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.