|
For something i was working on, i needed to print all of the non-dithering web colors. These colors are 6 digit hex strings, prepended with a '#'. each pair of hex digits can either be '00','33','66','99','cc' or 'ff'. This makes 216 combinations (the 'web-safe' palette). First i came up with:
my@a=map{$_ x2}split//,'0369cf';my(@b,@c);map{push@b,$_;map{push@c,$_;map{print"#$b[$#b]$c[$#b]$_\n";}@a}@a}@a;
at 111 bytes. not too good. so i took another approach and shortened it to 82 bytes:
my@a=split//,'0369cf';for my$a(@a){for my$b(@a){for(@a){print"#$a$a$b$b$_$_\n";}}}
but this is still pretty big. can anyone do better?
update: and obviously you have to comply with strict and -w. |
Re: Golfing Colors
by MeowChow (Vicar) on Jun 01, 2001 at 21:52 UTC
|
I was inspired to take a rather unique approach. Not really golfing, but:
$_ = "0369cf" x 3;
print "#$1$1$2$2$3$3\n" while /.*(.).*(.).*(.)(?(?{$h{"$1$2$3"}++})^)/
+;
MeowChow
s aamecha.s a..a\u$&owag.print | [reply]
[d/l] |
Re: Golfing Colors
by japhy (Canon) on Jun 01, 2001 at 19:35 UTC
|
There's some useless doubling happening there. And if you're using $a and $b, they're ok by strict.
# 65 chars
sub colors {
for$a(@_='00336699ccff'=~/../g){for$b(@_){print"#$a$b$_\n"for@_}}
}
japhy --
Perl and Regex Hacker | [reply]
[d/l] |
|
|
sub colors {
for$a(@_='0369cf'=~/./g){for$b(@_){print"#$a$a$b$b$_$_\n"for@_}}
}
MeowChow
s aamecha.s a..a\u$&owag.print | [reply]
[d/l] |
|
|
| [reply] |
|
|
And, replacing $a with $&, 60 chars:
sub colors {
map{for$b(@_){print"#$&$&$b$b$_$_\n"for@_}}@_="0369cf"=~/./g
}
Update: WRONG, as chipmunk pointed out immediately. (I did worse than not test, I ran it and failed to look closely at the output!)
p
| [reply]
[d/l] |
|
|
Re: Golfing Colors
by MeowChow (Vicar) on Jun 01, 2001 at 19:42 UTC
|
# tilly's combinator
sub c {
@r='';@r=map{$c=$_;map$c.$_,@r}@_ for 1..shift;@r
}
print join $/, map "#$_", c qw(3 00 33 66 99 CC FF);
MeowChow
s aamecha.s a..a\u$&owag.print | [reply]
[d/l] |
Re: Golfing Colors
by jmcnamara (Monsignor) on Jun 01, 2001 at 20:20 UTC
|
This isn't really a problem of combinations, it's a printf problem. ;-)
The direct approach works just as well:
my $h = 0x33;
for my $i (0..5) {
for my $j (0..5) {
for my $k (0..5) {
printf"#%02x%02x%02x\n", $i*$h, $j*$h, $k*$h;
}
}
}
And the best I can golf that to is 77 chars:
for $a(0..5){for $b(0..5){printf"#%02x%02x%02x\n",$a*51,$b*51,$_*51for 0..5}}
As an aside, the common abuse of $a and $b in Golf isn't really in the spirit of strict even if it does give strict compliance.
John.
--
| [reply]
[d/l]
[select] |
|
|
75 if you drop those two spaces:
for$a(0..5){for$b(0..5){printf"#%02x%02x%02x\n",$a*51,$b*51,$_*51for 0..5}}
| [reply]
[d/l] |
|
|
"As an aside, the common abuse of $a and $b in Golf isn't really in the spirit of strict even if it does
give strict compliance."
That's golf, brother. (Just picture a cloister full of monks quietly going about their business and all pausing to stick their tongues out at you.)
p
| [reply] |
Re: Golfing Colors -- direct, strict+w, no temps
by Zaxo (Archbishop) on Jun 02, 2001 at 04:19 UTC
|
69 strokes, no $a,$b abuse.
map{printf'#%02x%02x%02x
',$_%6*51,($_/=6)%6*51,($_/6|0)*51}(0..215);
After Compline
Zaxo
Update:Doh, forgot to remove unneeded list parens. 67 strokes.
map{printf'#%02x%02x%02x
',$_%6*51,($_/=6)%6*51,($_/6|0)*51}0..215;
--Z
| [reply]
[d/l]
[select] |
Re: Golfing Colors
by Masem (Monsignor) on Jun 01, 2001 at 19:50 UTC
|
You can drop a few characters from
my@a=split//,'0369cf';
to
my@a='0369cf'=~/./g;
Shaves off two characters...
Dr. Michael K. Neylon - mneylon-pm@masemware.com
||
"You've left the lens cap of your mind on again, Pinky" - The Brain
| [reply]
[d/l]
[select] |
|
|
