Re: (Golf) Mandelbrot Fractal

[tadman]

Based on some musings in a deeper thread, a slight modification brings it to 131:

map{$i=$_/20-1;map{$r=$j=$_/20-2.3;$z=$i;($m=$r*$r,$n=$z*$z,$z=2*$r*$z+$i,$r=$m-$n+$j)for a..z;print$m<4?$":"+"}0..59;print$/}0..39

Update: With a bit of hackery then at 130:

map{$i=$_/20-1;map{$r=$j=$_/20-2.3;$z=$i;($n=$z*$z,$z=2*$r*$z+$i,$r=($m=$r*$r)-$n+$j)for a..z;print$m<4?$":"+"}0..59;print$/}0..39

As a note, using 'X' instead of '+' would save 2 characters.

If a slight readjustment of the newlines isn't invalid, you get 126:

print map{$i=$_/20-1;$/,map{$r=$j=$_/20-2.3;$z=$i;($n=$z*$z,$z=2*$r*$z+$i,$r=($m=$r*$r)-$n+$j)for a..z;$m<4?$":"+"}0..59}0..39

[educated_foo]

125:

-l map{$i=$_/20-1;print map{$r=$;=$_/20-2.3;$z=$i;$n=$z*$z,$m=$r*$r,$z
+=2*$r*$z+$i,$r=$m-$n+$;for a..z;$m<4?$":"+"}0..59}0..39

/s
Update: 123

-l map{$i=$_/20,print map{$r=$;=$_/20;$z=$i;$n=$z*$z,$m=$r*$r,$z=2*$r*
+$z+$i,$r=$m-$n+$;for a..z;$m<4?$":"+"}-46..13}-20..19

[belg4mit]

With some bending of the rules(?), we get a little more detail, and 117 chars

perl -Mconstant=Z,20 -l

map{$i=$_/Z,print map{$r=$;=$_/Z;$z=$i;$n=$z*$z,$m=$r*$r,$z=2*$r*$z+$i
+,$r=$m-$n+$;for a..z;$m<4?$":"+"}-46..Z}-19..Z

116 @ Wed May 8 19:50:10 EDT 2002

map{$i=$_/Z,print map{$r=$;=$_/Z;$z=$i;$n=$z*$z,$z=2*$r*$z+$i,$r=($m=$
+r*$r)-$n+$;for a..z;$m<4?$":"+"}-46..Z}-19..Z

BTW, I like the use of $; :-)

UPDATE: Changed outside range from -20..Z to -19..Z to eliminate extra lines of +.

--
perl -pew "s/\b;([mnst])/'$1/g"

[hagus]

Jesus christ ...

But I think using the constant declaration on the outside is cheating. Hmm!


--
Ash OS durbatulk, ash OS gimbatul,
Ash OS thrakatulk, agh burzum-ishi krimpatul!
Uzg-Microsoft-ishi amal fauthut burguuli.

[tadman]

That use of $; is very clever, as it parses correctly and allows you to omit the brackets for the for. Combining this with other modifications yields 122 chars of obfuscated goodness:

print map{$i=$_/20;$/,map{$r=$;=$_/20;$z=$i;$n=$z*$z,$z=2*$r*$z+$i,$r=($m=$r*$r)-$n+$;for a..z;$m<4?$":"+"}-46..13}-20..19

Further savings if you choose 'X' instead of '+':

print map{$i=$_/20;$/,map{$r=$;=$_/20;$z=$i;$n=$z*$z,$z=2*$r*$z+$i,$r=($m=$r*$r)-$n+$;for a..z;$m<4?$":X}-46..13}-20..19

Here is the original C code, just for comparison, at 182 characters:

void main(){double O,x,o,I,l,i;char _;for(l=-1;l<1;l+=.05,putc
;i<.7;i+=.05,putchar(_?'?':':'),O=i,x=l,o=I=(_=1)--)for(;++_&&
);x=2*O*x+l,O=o-I+i);}

C allows for shorter variable names, and Perl still comes out ahead. Crazy.

[pdcawley]

The only catch appears to be that, when I actually run this, it doesn't work. Of course, I could well be going mad.