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Acme::EyeDrops - Visual Programming in Perl (Displayed)
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Acme::EyeDrops - Visual Programming in Perl
Acme::EyeDrops - Visual Programming in Perl
use Acme::EyeDrops qw(sightly);
print sightly( { Shape => 'camel',
SourceFile => 'eyesore.pl' } );
Acme::EyeDrops converts a Perl program into an equivalent one,
but without all those unsightly letters and numbers.
In a Visual Programming breakthrough, EyeDrops allows you to pour
the generated program into various shapes, such as UML diagrams,
enabling you to instantly understand how the program works just
by glancing at its new and improved visual representation.
Unlike Acme::Bleach and Acme::Buffy, the generated program runs
without requiring that Acme::EyeDrops be installed on the target
system.
Suppose you have a program, helloworld.pl, consisting of:
print "hello world\n";
To convert this little program into an equivalent camel-shaped one,
create cvt.pl as follows:
# cvt.pl. Convert helloworld.pl into a camel shape.
use Acme::EyeDrops qw(sightly);
print sightly( { Shape => 'camel',
SourceFile => 'helloworld.pl',
Regex => 1 } );
Then run it like this:
perl cvt.pl >new.pl
After inspecting the newly created program, new.pl, to verify that
it does indeed resemble a camel, run it:
perl new.pl
to confirm it behaves identically to the original helloworld.pl.
Instead of using the API, as shown above, you may find it more
convenient to use the sightly.pl command in the demo directory:
sightly.pl -h (for help)
sightly.pl -s camel -f helloworld.pl -r >new.pl
cat new.pl (should look like a camel)
perl new.pl (should print "hello world" as before)
Notice that the shape 'camel' is just the file camel.eye in
the EyeDrops sub-directory underneath where EyeDrops.pm is located,
so you are free to add your own new shapes as required.
If your boss demands a UML diagram describing your program, you
can give him this:
print sightly( { Shape => 'uml',
SourceFile => 'helloworld.pl',
Regex => 1 } );
If it is a Windows program, you can indicate that too, by
combining shapes:
print sightly( { Shape => 'uml,window',
Gap => 1,
SourceFile => 'helloworld.pl',
Regex => 1 } );
producing this improved visual representation:
''=~('('.'?'.'{'.('`'|'%').('['^'-').(
( (
( (
( (
( (
( (
'`'))))))))))|'!').('`'|',').'"'.('['^
(
( (
( (
'+'))))
)
)
.('['^')').('`'|')').('`'|'.').(('[')^
( (
( (
'/'))))).('{'^'[').'\\'.('"').( '`'|'(').('`'|'%').('`'|"\,").(
( ( ( (
( ( ( (
( ( ( (
( ( ( (
( ( ( (
'`'))))))))))))))))))))|"\,").( '`'|'/').('{'^'[').('['^"\,").(
'`'|'/').('['^')').('`'|',').('`'|'$').'\\'.'\\'
.('`'|'.').'\\'.'"'.';'.('!'^'+').'"'.'}'."\)");
$:='.'^'~';$~='@'|'(';$^=')'^'[';$/='`'|"\.";$,=
"\("^ (( '}'))
;($\) =( '`')|
"\!"; $: =')'^
"\}"; $~ ='*'|
"\`"; $^ ='+'^
"\_"; $/ ='&'|
"\@"; $, ='['&
"\~"; $\ =','^
"\|"; $: ='.'^
"\~"; $~ ='@'|
"\("; $^ =')'^
'[';$/='`'|'.';$,='('^'}';$\='`'|'!';$:=')'^'}';
($~)= (( '*'))
|'`'; $^ ='+'^
"\_"; $/ ='&'|
"\@"; $, ='['&
"\~"; $\ =','^
"\|"; $: ='.'^
"\~"; $~ ='@'|
"\("; $^ =')'^
"\["; $/ ='`'|
"\."; $, ='('^
"\}"; $\ ='`'|
'!';$:=')'^'}';$~='*'|'`';$^='+'^'_';$/='&'|'@';
$,='['&'~';$\=','^'|';$:='.'^'~';$~='@'|"\(";$^=
')'^'[';$/='`'|'.';$,='('^'}';$\='`'|'!';$:=')';
This is a Visual Programming breakthrough in that you can tell
it is a Windows program and see its UML structure too,
just by glancing at the code.
For Linux only, you can apply its /usr/games/banner command
to the program's source text:
print sightly( { Shape => 'srcbanner',
Width => 70,
SourceFile => 'helloworld.pl',
Regex => 1 } );
The generated program is easier to understand than the
original because its characters are bigger and easier to read.
Here is a summary of the Perl 6 development effort so far:
print sightly( { Shape => 'jon,larry,damian,simon,parrot,buffy3',
Gap => 3,
Regex => 1,
Print => 1,
SourceString => <<'END_HAIKU' } );
Coffee mug shatters
Larry Apocalyptic
Parrot not a hoax
Design, debate, sift
Prankster Piers pawky precis
Weekly light relief
Gallop Ponie bold!
Beer to gulp, Buffy astride
Orange sky surrounds
END_HAIKU
producing:
''=~(
'('."\?".
'{'.('['^'+'
).('['^"\)").(
'`'|')').('`'|
'.').('['^'/').
'"'.('`'^'#').(
'`'|'/').(('`')|
'&').('`'|'&').(
'`'|'%').("\`"|
'%').('{'^'[').
('`'|('-')).(
'['^"\.").(
'`'|"'").(
'{'^'[').('['^'(')
.('`'|'(').('`'|'!')
.('['^'/').('['^"\/").(
'`'|'%').('['^')').('['^"\(").(
'!'^'+').('`'^',').('`'|'!').('['^')').(
'['^')').('['^'"').('{'^'[').('`'^'!').('['^'+')
.('`'|'/').('`'|'#').('`'|'!').('`'|',').('['^'"').
('['^'+').('['^'/').('`'|')').("\`"| "\#").(
'!'^'+').('{'^'+').('`'|('!')).( '['
^')').('['^')').('`'|"\/").(
'['^'/').('{'^'[').('`'|'.')
.('`'|'/').('['^'/').(('{')^
'[').('`'|'!').('{'^'[').('`'
|'(').('`'|'/').('`'|('!')).(
'['^'#').('!'^'+').('!'^'+').(
'`'^'$').('`'|'%').('['^'(').(
'`'|')').('`'|"'").('`'|"\.").
','.('{'^'[').('`'|'$').("\`"|
'%').('`'|'"').('`'|'!').("\["^
'/').('`'|'%').','.('{'^('[')).(
'[' ^'(').('`'|')').('`'|'&').("\["^
'/').('!'^ '+').('{'^'+').('['^')').(('`')|
'!').('`'|'.' ).('`'|'+').('['^'(').('['^'/'). +(
'`'|'%').('['^')').('{'^'[').('{'^'+').(('`')| ( (
')'))).('`'|'%').('['^')').('['^'(').('{'^'[').( ( (
'['))^'+').('`'|'!').('['^',').('`'|'+').('['^'"'). (('{')^
'[').('['^'+').('['^')').('`'|'%').('`'|'#').(('`')| ')').('['^
'(').('!'^'+').('{'^',').('`'|'%').('`'|'%').('`'|'+').('`'|','
).('['^'"').('{'^'[').('`'|',').('`'|')').('`'|"'").('`'|'(').(
'['^'/').('{'^'[').('['^')').('`'|'%').('`'|',').('`'|')').('`'|
"\%").( "\`"| '&').('!'^'+').('!'^'+').('`'^"'").('`'|'!').(
(( '`'))|',').('`'|',').('`'|'/').('['^'+').('{'
^'[').('{'^'+').('`'|'/').('`'|'.').('`'|')'
).('`'|'%').('{'^'[').('`'|('"')).( "\`"|
'/').('`'|',').('`'|'$').'!'.('!'^'+'
).('`'^'"').('`'|'%').('`'|'%').("\["^
')').('{'^'[').('['^'/').('`'|'/').('{'
^'[').('`'|"'").('['^'.').('`'|',').('['^
'+').','.('{'^'[').('`'^'"').('['^"\.").(
'`'|'&').('`'|"\&").( '['^'"').('{'^'[').(
'`'|'!').('['^"\(").( '['^'/').('['^')').
('`'|')').('`'|'$').( '`'|'%').('!'^'+')
.('`'^'/').('['^
')').('`'|'!').('`'|'.'
).('`'|"'").('`'|'%').('{'^'['
).''. ('['
^'(' ).(
'`'| '+'
).+( ( '['
)^(( ( '"'
)))) .( ( '{'
)^(( ( ( '['
))) )) .( '['
^(( (( ( '('
))) ))). ( '['
^(( '.') ) ).(
'[' ^')' ) .+(
'[' ^(')')).( ( '`'
)|+ (( ( ((
'/' )) ) ))
).( ( ( ((
'[' ) )))^+
'.' ) .(
'`' | '.').('`'|'$').('['^'(').('!'^'+').'"'
.(( '}'))."\)"); $:='.'^ ( ( "\~")); (
$~) = ( '@' )|+ (( ( ( (( '(' ))) )
)); ( ( $^))=')'^'[' ; ( $/)='`'|'.'; (
$,) = ( ( ( (
(( '(' ) ) ) )) )
^+ ( '}'); ( ( $\ )
)= ( ( ( ( ( (
(( ( '`' )))))))))|"\!"; ( $:)=')'^'}';
$~ = ( ( (
( ( ( ( (
( ( ( '*' ) )
) ))) )) )
) ) |'`';$^='+'^('_');$/= (
( ( '&')))|'@';$,='['&'~';$\ =
( ( ','))^'|';$:='.'^('~');$~= (
( ( '@')) )|'(';$^="\)"^ '['; (
( ( $/)) ) = '`' |
(( '.' ));$,='('^'}';$\ =((
( (
( (
( (
( ( (
( ( (
( ( (
( ( (
( ( ( (
( ( ( (
( '`' )) )
) ))))))))))) )
)))))))))))))|+
'!';$:=')'^('}');$~=
'*'|'`';$^='+'^'_';$/='&'
|'@' ;$,=
'['& '~';
($\) =','
^'|' ;$:=
'.'^ '~';
($~) ='@'
|'(' ;$^=
')'^ '['
;$/= '`'|
'.'; $,='(' ^'}'
;$\= '`'| ( '!'
);( $:) =')'^'}' ; $~=
'*' | '`'; $^= ( '+'
)^+ ( '_');$/='&' | '@'
;$, = ( '['
)&+ ( ( '~'
)); ( ( $\)
)=( ( ( ','
))) ^ ( '|'
); ( ( $:)
) =( ( ( ((
( (( ( ( ((
( '.') ))))))))) )))^(( '~'
) );( $~) =(( '@' ))| '('
; $^ =( ')')^'[' ;$/='`' |+
( ( (( (( '.') )) ) )) ;$,= (( (
( ( '(' )))))^'}'; ( $\)='`'|'!' ;
( ( $: ) )
= (( ( ((
( ')' ) ))
) ))^ ( '}'
);($~)= ( '*'
)|'`' ; ( ( $^)
)='+' ^ ( ( '_'
));$/= '&'|"\@";$,= '['&
'~';$\ =','
^'|';$: ='.'^'~';$~='@'|'(' ;$^=
')'^'['; $/='`'|'.';$,='('^'}';$\ ='`'
|'!';$:= (( "\)"))^
'}';$~="\*"| '`';$^='+'^'_';$/= ('&')|
'@';$,='[' &'~';$\="\,"^ "\|";
$:='.'^'~' ;($~)=
'@'|('(');$^= ')'^"\[";
$/='`'|'.';$,='('^'}';$\='`'|'!'
;$:=')'^'}';$~='*'|'`';$^=('+')^
'_';$/='&'|'@';$,='['&('~');$\=
','^'|';$:='.'^'~';$~='@'|'(';
$^=')'^'[';$/='`'|'.';$,='('
^'}';$\='`'|'!';$:=(')')^
'}';$~='*'|'`';$^="\+"^
'_';$/='&'|('@');$,=
'['&'~';$\=(',')^
'|';$:='.'^
'~';$~='@'|"\(";
$^=')'^'['; $/=('`')|
'.';$,='('^'}' ;$\='`'|'!'
;$:=')'^"\}";$~= '*'|"\`";$^=
'+'^'_';$/='&'|'@' ;$,='['&"\~";
$\=','^'|';$:='.'^'~' ;$~='@'|"\(";
$^=')'^'[';$/='`'|"\."; $,='('^'}';$\
='`'|'!';$:=')'^"\}";$~= '*'|'`';$^='+'
^'_';$/='&'|'@';$,='['&'~' ;$\=','^'|';$:
='.'^'~';$~='@'|'(';$^=')'^ '[';$/='`'|'.';
$,='('^'}';$\=('`')| '!' ;$: =')'^'}'
;$~='*'|'`';$^='+' ^'_';$/
='&'|'@';$,=('[')& '~';$\=
','^'|';$:='.'^'~' ;($~)=
'@'|'(';$^=')'^'['; $/='`'
|'.';$,='('^'}';$\= "\`"|
'!';$:=')'^"\}";$~= ( '*')
|'`';$^='+'^'_';$/ = '&'
|'@';$,='['&'~';$\ = ((
','))^'|';$:="\."^ ( ((
'~')));$~='@'|'('; ( ( ( ( ( ( (
$^)))))))=')'^"\["; ( ( ( ( (
$/)))))='`'|'.';$, ='('^ '}' ; (
( $\))='`'|'!';$: =')'^'}' ;($~) = (
( '*'))|'`';$^ = (
'+')^"\_"; ( $/)
= '&' | (
( ( (
( ( (
( ( (
( ( ( ( ( ( (
( ( ( ( (
( ( ( (
( (
( (
( ( '@')))))) )
) ) )))))))))))))
) ) )))))))) ;
( ( $,))='['&'~';
( ( ( (
( ( ( (
( ( (
( ( ( ( (
( (
( (
( (
( ( (
( (
( ( ( (
$\)))))))
))))))))))))))
))))))))))=','^"\|";
$:='.'^'~';$~='@'|'(';$^=
')'^'[';$/=('`')| '.';$,=
'('^'}';$\='`'|'!';$: =')'^'}'
;$~='*'|'`';$^='+'^'_';$/='&'|'@';$,
='['&'~';$\=','^'|';$:='.'^'~';$~="\@"|
'(';$^=')'^'[';$/='`'|'.';$,='('^('}');$\=
'`'|'!';$:=')'^'}';$~='*'|'`';$^='+'^'_';$/=
'&'|'@';$,='['&'~';$\=','^'|';$:='.'^"\~";$~=
'@'|'(';$^=')'^'[';$/='`'|'.';$,='('^ '}'
;$\='`'|'!';$:=')'^'}';$~='*'|'`';$^= '+'
^'_';$/='&'|'@';$,='['&'~';$\=','^'|'
;$:='.'^'~';$~='@'|'(';$^=')'^'[';$/=
'`'|'.';$,='('^'}';$\='`'|'!';$:="\)"^
'}';$~='*'|'`';$^='+'^'_';$/='&'|"\@";
$,='['&'~';$\=','^'|';$:='.'^('~');$~=
'@'|'(';$^=')'^'[';$/='`'|'.';$,="\("^
'}';$\='`'|'!';$:=')'^'}';$~='*'|'`';
$^='+'^'_';$/='&'|'@';$,='['&"\~";$\=
','^'|';$:='.'^'~';$~='@'|('(');$^=
')'^'[';$/='`'|'.';$,='('^"\}";$\=
'`'|'!';$:=')'^'}';$~='*'|"\`";$^=
'+'^'_';$/='&'|'@';$,='['&('~');$\=
','^'|';$:='.'^'~';$~='@'|"\(";$^=
')'^'[';$/='`'|'.';$,='('^('}');$\=
'`'|'!';$:=')'^'}';$~='*'|"\`";$^=
'+'^'_';$/='&'|'@';$,='['&"\~";$\= ','
^'|';$:='.'^'~';$~='@'|'(';$^=')'^ (
'[');$/='`'|'.';$,='('^('}');$\= '`'|
'!';$:=')'^'}';$~='*'|('`');$^= '+'^'_'
;$/='&'|'@';$,='['&'~';$\=','^ '|';$:='.'^
'~';$~='@'|'(';$^=')'^'[';$/= '`'|'.';$,='('
^'}';$\='`'|"\!";$:= (( ')'))^'}';$~='*'|
'`';$^='+'^('_');$/= ( '&')|'@';$,='['&'~'
;$\=','^'|';$:="\."^ ( ( '~'));$~='@'|'(';
$^=')'^'[';$/='`'|'.' ; $,='('^'}';$\=
'`'|'!';$:=')'^'}';$~ ='*'|"\`";
($^) ='+'^'_';$/='&' |'@';$,
=(( '['))&('~');$\= ','
^+ '|';$:='.'^"\~";
( $~)='@'|"\(";$^=
')'^'[';$/="\`"|
'.';$,='('^"\}";
$\
='`'|'!'
;$:=(')')^
'}';$~="\*"|
'`' ;$^
= (
( (
'+' ))
)^(( '_'
));$/ ='&'
|'@'; ( $,)=
"\["& '~';
$\="\,"^ '|' ;($:)
= '.' ^ ( ( (
( ( ( ( (
( ( ( (
( '~')))))))))) )
) );$~='@'|'(';$^ = ')'^ '[';
( $/)='`'|'.';$,= ( ( '('))^'}';$\= ((
( '`')))|"\!";$:= ( ( ')'))^'}'; (
( $~))='*'|'`'; ( $^)='+'^'_'; $/
= '&'|('@');$,= ( ( ('[')))& '~'; $\
= ','^('|');$:= ( '.')^'~' ; ( $~
) ='@'|"\(";$^= ')' ^+ '['; $/= ((
( '`')))|"\.";$,= '(' ^+ (( ( (( '}'
) ))));$\='`'|('!');$:= (( (( ')')) ))
^ '}';$~='*'|'`';$^='+'^ (( '_'));$/ =(
'&' )|'@';$,='['&'~';$\=','^ '|' ;$:='.'^ ((
'~'));$~='@'|'(';$^=')'^'['; $/ ='`' |('.');$,=
('(')^ '}';$\='`'|'!';$:=')' ^(( (( '}')))) ;($~)=
'*' |'`';$^='+'^"\_";$/= '&'|('@');$,= (( (
'[' )) )&"\~";$\= (( ',') )^'|';$: ='.'
^'~' ;$~='@' |'(';$^ =( ')')^"\["; ($/)=
'`'|'.' ;$, ='(' ^(( (( '}' )))
);( $\ )=( (( '`' )) )|'!';$:=
(( (( (( ')')) )) ))^'}'
;( ( $~) )='*' |+ '`'
;( $^ )= "\+"^ '_' ;(
$/ )= (( '&'))|'@'; $,= '['&
'~' ;( $\ )=(( ','))^ (( '|')
);( $: )= '.'^ '~';$~ ="\@"|
'(' ;( $^ )= (( ')'))^'[';$/ =(
(( '`' )) )| (( "\."));$,=
(( '(' ) )^ (( '}')); $\ ='`'
|+ '!' ;$:= ( (( (( ((
(( (( ')') ) )) )) )
)) ))^(( ( ( (( '}'))) ))
); $~ ='*' |+ (( '`')) ;(
$^ )='+'^'_' ;( ($/)) ='&' |+
(( '@'));$, ='['&'~';$\= "\,"^ '|';
$:= (( '.'))^"\~";$~= '@'| '(';$^
="\)"^ '[';$/='`'|'.';$,='('^'}';$\=
('`')| '!';$:=')'^"\}";$~= '*'|'`';$^=
'+'^'_' ;$/='&'|'@' ;$,='['& '~';$\=','
^'|';$:= '.'^'~'; $~='@'| '(';$^=')'
^'[';$/= '`'|'.' ;($,) ='('^'}'
;$\='`' |"\!"; ($:)= ')'^'}'
;($~)= '*'| '`';$^ =('+')^
"\_"; ($/)= ('&')| '@';$,='['
&'~' ;$\=(',')^ '|';$:="\."^
'~'; $~='@'|'('; $^=')'^"\[";
($/) ='`'|'.';$, ='(' ^'}'
;($\) ='`'|'!';$: =')' ^+
'}';$~ ='*'|'`';$^= '+'^'_';
$/='&'| '@';$,='['
&'~';$\= (',')^
'|';$:=
'.'^'~'
;$~='@'
Let's get more ambitious and create a big self-printing JAPH.
my $src = <<'FLAMING_OSTRICHES';
open 0;
$/ = undef;
$x = <0>;
close 0;
$x =~ tr/!-~/#/;
print $x;
FLAMING_OSTRICHES
print sightly( { Shape => 'japh',
SourceString => $src,
Regex => 1 } );
This works. However, if we were to change:
$x =~ tr/!-~/#/;
to:
$x =~ s/\S/#/g;
the generated program would malfunction in strange ways because
it is running inside a regular expression and Perl's regex engine
is not reentrant. In this case, we must resort to:
print sightly( { Shape => 'japh',
SourceString => $src,
Regex => 0 } );
which runs the generated sightly program via eval instead.
If you want to use Regex => 1, ensure the program to be converted
is careful with its use of regular expressions and $_.
To produce a JAPH that resembles the original
Just another Perl hacker, aka Randal L Schwartz, try this:
print sightly( { Shape => 'merlyn',
SourceString => 'Just another Perl hacker,',
Regex => 1,
Print => 1 } );
producing:
''=~('('.'?'.'{'.('['
^'+').('['^')').('`'|')').(
'`'|'.').('['^'/').'"'.('`'^'*')
.('[' ^'.')
.('[' ^'(')
.('[' ^'/')
.('{'^ '[').(
"\`"| '!').(
'`'| '.').(
'`'| ( ( '/'))).
('[' ^ ( ( '/'))).(
'`'| ( ( ( ( '('))))).
('`'| ( ( ( ( '%'))))).
('['^ ( ( ( ( ')'))))).
('{'^ '[') .( ( (( ('{'))))^
'+'). ( '`'|'%' ).("\["^ ')').('`'
|',').('{'^ '[').('`'
|'(').('`' |"\!").(
'`'|'#').( ('`')| '+').( '`'|'%')
.('['^')') .(( ',' )). '"' .('}').
"\)");$:= ('.')^ ( "\~"); $~='@'|
('(');$^= (( ')' )) ^ (( '[' )) ;($/)=
'`'|'.'; $,='('^'}' ; $\='`'|'!' ;($:)
=(')')^ ( '}'
);($~) = '*'
|'`'; ( ( ( $^)
) )= ( ( ( '+'
) ) ) ^ ( ( ( '_'
) ) ) ; ( ( ( $/
) ) ) =
( ( ( (
( ( ( (
( '&')))))))))|'@' ; ( (
( ( ( ( ( $,
) ) ) ) ) ))
= ( (( (( ( (
( ( ( (( ( (
( ( '[')) ) )
) ) ) )
) ) ) )
) ) )
) & (
( ( (
( ( (
( (
( (
'~' ))
)))))))))
Because the sightly encoding is not very compact, you sometimes
find yourself playing a surreal form of Perl Golf, where
the winner is the one with the smallest f.tmp in:
sightly.pl -r -f program_to_be_converted >f.tmp
Apart from reducing the (key-)stroke count, you must avoid regexes
and strive to replace alphanumeric characters with sightly ones,
which do not require sightly encoding.
To illustrate, consider the intriguing problem of creating
Buffy looking in the mirror. Let's start with k.pl:
open$[;chop,($==y===c)>$-&&($-=$=)for@:=<0>;
print$"x-(y---c-$-).reverse.$/for@:
Notice that EyeDrops-generated programs, by default, contain no
trailing spaces, which complicates the above program.
Buffy looking in the mirror can now be created with:
sightly.pl -r -f k.pl -s buffy2 >b.pl
cat b.pl (should show Buffy's face)
perl b.pl (should show Buffy looking in the mirror)
Drat. This requires two buffy2 shapes. What to do?
Well, you could use the TrailingSpaces attribute
(-T switch to sightly.pl) to append the required
number of trailing spaces to each line, allowing you to
write a briefer kk.pl:
open$%;chop,print+reverse.$/for<0>
and finally produce Buffy looking in the mirror with:
sightly.pl -Tr -f kk.pl -s buffy2 >bb.pl
Alternatively, the Compact attribute (-m switch to
sightly.pl) could be used to produce a solution free
of any trailing spaces:
sightly.pl -mr -f k.pl -s buffy2 >buffy.pl
cat buffy.pl (should show Buffy's face)
perl buffy.pl (should show Buffy looking in the mirror)
producing buffy.pl:
''=~('(?{'.(
'`'|'%').('['^'-'
).('`'|'!').('`'|','
).+ ( '"'
).( ( '`'
)|+ ( '/'
)). ( '['
^(( ( '+'
))) ).('`' |((
'%' ))). ( '`'
|(( '.') ) ).+
((( (( ( (((
((( ( ( (((
((( ( '\\')))
))) ) ) ) )
) )))) )))))) .'$[;' . (
( ( (( ( (
( ( ( (( ( ( (( ( ( (
( ( '`') )))) ) )
) ) ))) )
) ))) ) )
)| ( ( ( ( ((
'#' ) ) ) )))
).(('`')| ('(')).(
'`'|'/'). ('['^'+') .',(\\$'
.'=='.('[' ^'"') . '==='.+(
'`'|'#').')' . '>\\$-'
.'&&(\\$-=\\' . '$=)'.(
'`'|'&').('`' | ( '/')).(
'['^')').'\\' . '@:=<' .
('^'^(('`')| "\.")). (
'>').(';').( '!'^'+' )
.('['^'+'). ('['^')' ).('`'|
')').("\`"| "\.").( ( ('['))^
"\/").'\\$\\"'.( ( "\[")^ ( (
( ( "\#"))))). ( ( '-')) . (
( ( ('(')))).( ( ( '[')) ^ (
( '"'))).'--' . '-'. ( (
( '`'))|'#'). ( ( (
( '-')))). ( ( (
( ( '\\' ) )
) ) ) .
( ( ( (
( ( ( ( (
( ( ( ( (
( ( ( ( (
( ( ( ( (
( '$'))))))))))))))))))))))))).'-).'.('['^ ( (
( ')')))).('`'|'%').('['^'-').('`'|'%').(('[')^ (
( ')'))).('['^'(').('`'|'%').'.\\$/'.('`'|'&').( (
( '`'))|'/').('['^')').'\\@:'.('!'^'+').'"})');$:= (
( '.'))^'~';$~='@'|'(';$^=')'^'[';$/='`'|'.';$,='(' ;
This is perhaps a cleaner solution, though some people
find the plain sightly encoding more pleasing to the eye.
Showing the face upside down, rather than reflected, is more
easily solved with:
open$%;print+reverse<0>
and easier still for a self-printing shape:
open$%;print<0> # self printing
open$%;print+map{y;!-~;#;;$_}<0> # replace sightly with '#'
Let's extend the Buffy example of the previous section to produce
a camel-shaped program capable of somersaulting across the screen
when run.
We start with a generator program, gencamel.pl:
print sightly( { Regex => 1,
Compact => 1,
RemoveNewlines => 1,
Indent => 1,
BorderGapRight => 1,
Shape => 'camel',
SourceString => <<'END_SRC_STR' } );
$~=pop||'';open$%;
y,!-~,#,,s,(.).,$+,gs,$~&&($_=reverse)for@~=grep$|--,('')x18,<0>;
@;=map~~reverse,reverse@~;
map{system$^O=~Win?CLS:'clear';
($-=$_%3)||(--$|,map$_=reverse,@~,@;);
print$"x($=/3*abs$|*2-$-),$_,$/for$-&1?@;:@~;
sleep!$%}$%..11
END_SRC_STR
Note the use of the Compact and RemoveNewlines attributes,
necessary here to squeeze the above program into a single
camel shape.
Running this program:
perl gencamel.pl >camel.pl
produces camel.pl:
''=~('(?{'.(
('`')| '%').('['^'-').
('`'|'!'). ('`'|',').'"\\$~='
.('['^'+') .('`'| '/').('['^'+').'||'.
"'"."'".';'.('`'|'/' ).('['^'+').('`'|'%').
('`'|'.').('\\$%;').( '['^'"').(',!-~,#,,').(
'['^'(').',(.).,\\' .'$+,'.('`'|"'").('['^'(')
.',\\$~&&(\\$' .'_='.('['^')').('`'|('%')).(
'['^'-').('`'| '%').('['^')').('['^'(').(('`')|
'%').')'.("\`"| '&').('`'|'/').('['^"\)").'\\@~='.(
'`'|"'").("\["^ ')').('`'|'%').('['^'+').('\\$|--,(').
"'"."'".(')').( '['^'#').('^'^('`'|'/')).(':'&'=').',<'.
('^'^('`'|'.') ).'>;\\@;='.('`'|'-').('`'|'!').('['^'+')
.'~~'.('['^')' ).('`'|'%').('['^'-').('`'|'%').('['^')').
('['^'(').('`'|'%').','.('['^')').('`'|'%').('['^'-').('`'
|'%').('['^')').('['^'(').('`'|'%').'\\@~;'.('`'|'-').('`'|
'!').('['^'+').'\\{'.('['^'(').('['^'"').('['^'(').(('[')^
'/').('`'|'%').('`'|'-').'\\$^'.('`'^'/').'=~'.('{'^"\,").(
'`'|')').('`'|'.').'?'.('`'^'#').('`'^',').('{'^'(').(':').
"'".('`'|'#').('`'|',').('`'|'%').('`'|'!').('['^')')."'".
';(\\$-=\\$_%'.('^'^('`'|'-')).')||(--\\$|,'.('`'|'-' ).(
'`'|'!').('['^'+').'\\$_='.('['^')').('`'|'%').('[' ^((
'-'))).('`'|'%').('['^')').('['^'(').('`' |('%')). ','
.'\\@~,\\@;);'.('['^'+').('['^(')')).( '`'|')' ).(
"\`"| '.').('['^'/').'\\$\\"'.("\["^ ('#')). '('
.'\\$=/'.('^'^('`'|'-')).'*'. (('`')| '!'
).("\`"| '"').('['^ "\("). '\\$|' .+
('*').( '^'^('`' |',')) .'-\\' .+
'$-),'. '\\$_,'. '\\$' .'/'. (
('`')| ('&')).( '`'| '/')
.('['^ ')').'\\' .'$' .'-'
.'&'. (('^')^( '`'| '/')
).'?' .'\\@;' .':' .''.
'\\' .'@~;' .''. ('['
^'(' ).( '`'| ',')
.''. ((( '`' ))|
'%' ).( '`' |((
'%' ))) .+( '['
^(( '+' ))) .+
(( '!')). ((
(( '\\') ))
). '$%\\}'. ((
((( '\\' ))))) .+
'$' .'%..' .''. (((
'^') )^("\`"| '/' )).(
"\^"^( ('`')|
('/'))). '"})');
Note: The use of a camel image in association with Perl is a
trademark of O'Reilly & Associates, Inc. Used with permission.
You can run camel.pl like this:
perl camel.pl normal forward somersaulting camel
perl camel.pl b camel somersaults backwards
perl camel.pl please do a backward somersault
same thing
You are free to add a leading #!/usr/bin/perl -w line to
camel.pl, so long as you also add a blank line after
this header line.
In a similar way to the somersaulting camel described above,
we create a camel-shaped program capable of emitting
twelve thousand and thirty two different camels when run.
As usual, we start with a generator program, gencamel.pl:
print sightly( { Regex => 1,
Compact => 1,
RemoveNewlines => 1,
BorderGap => 1,
Shape => 'camel',
SourceString => <<'END_SRC_STR' } );
$~=uc shift;$:=pop||'#';open$%;chop(@~=<0>);$~=~R&&
(@~=map{$-=$_+$_;join'',map/.{$-}(.)/,@~}$%..33);
$|--&$~=~H&&next,$~!~Q&&eval"y, ,\Q$:\E,c",$~=~I&&
eval"y, \Q$:\E,\Q$:\E ,",$~=~M&&($_=reverse),
print$~=~V?/(.).?/g:$_,$/for$~=~U?reverse@~:@~
END_SRC_STR
Running this program:
perl gencamel.pl >camel.pl
produces camel.pl, which you can run like this:
perl camel.pl normal camel
perl camel.pl q quine (program prints itself)
perl camel.pl m mirror (camel looking in the mirror)
perl camel.pl i inverted camel
perl camel.pl u upside-down camel
perl camel.pl r rotated camel
perl camel.pl h horizontally-squashed camel
perl camel.pl v vertically-squashed camel
And can further combine the above options, each combination
producing a different camel, for example:
perl camel.pl uri
produces a large, bearded camel with a pony-tail, glasses,
and a tie-dyed T-shirt. :)
camel.pl also accepts an optional second argument, specifying
the character to fill the camel with (default #).
For example:
perl camel.pl hv small camel filled with #
perl camel.pl hv "$" small camel filled with $
Why 12,032 camels? Combining the main options q, m, i, u, r, h, v
can produce 128 different camels. And there are 94 printable
characters available for the second argument, making a total
of 128 * 94 = 12,032 camels.
The final auction at Y::E 2002 in Munich featured an epic athletic
contest which you can remember with:
use Acme::EyeDrops qw(sightly);
my $s = sightly( { Regex => 1,
Shape => 'naw',
Indent => 1,
SourceString => <<'NAKED_ARM_WRESTLING' } );
$/='';open$%;$x=<0>;$y=<0>;
substr($y,428,$%)=' AAAAARRRGGGHHH!!!';
map{system$^O=~Win?CLS:'clear';
print$_&1?$y:$x;sleep!$%+($_&1)}$%..9
NAKED_ARM_WRESTLING
$s =~ s/ +$//m;
print $s;
Running this program:
print sightly( { Shape => 'baghdad',
Regex => 1,
Compact => 1,
RemoveNewlines => 1,
BorderGap => 1,
BorderWidthLeft => 3,
BorderWidthRight => 3,
BorderWidthTop => 2,
BorderWidthBottom => 8,
SourceString => <<'FAMOUS_COMICAL_ALI_QUOTES' } );
warn+(
"Britain is not worth an old shoe!",
"There are no American infidels in Baghdad!",
"We have them surrounded in their tanks!",
"I speak better English than this villain Bush!")[rand(4)],$/
FAMOUS_COMICAL_ALI_QUOTES
produces:
''=~('(?{'.('`'|'%').('['^'-').('`'|'!').('`'|',').'"'.('['^',').('`'|
'!').('['^')').('`'|'.').'+(\\"'.('`'^'"').('['^')').('`'|')').(('[')^
'/' ).(
'`' |'!').('`'|')' ).(
'`' |'.').('{'^'[').('`'| ')'
).( '['^'(').('{'^'[').('`'|'.' ).(
'`' |'/').('['^'/').('{'^'[').("\["^ ','
).( '`'|'/').('['^')').('['^'/').("\`"| '('
).( '{'^'[').('`'|'!').('`'|'.').('{'^'['). (((
'`' ))|'/').('`'|',').('`'|'$').("\{"^ '[' ).(
'[' ^'(').('`'|'(').('`'|'/').('`'|'%') .(( '!'
)). '\\",\\"'.('{'^'/').('`'|'(').("\`"| '%' ).(
'[' ^')').('`'|'%').('{'^'[').('`'|"\!").( '['^ ')'
).( '`'|'%').('{'^'[').('`'|'.').('`'|'/').( "\{"^ '['
).( '`'^'!').('`'|'-').('`'|'%').('['^"\)").( ('`')| ')'
).( '`'|'#').('`'|'!').('`'|'.').('{'^'[').('`'| ')').('`' |((
'.' ))).('`'|'&').('`'| ')').('`'|'$').('`'| '%'
).( '`'|',').(('[')^ '(').('{'^'['). (((
'`' ))|')').("\`"| '.').(('{')^ '['
).( '`'^('"')).( '`'|'!'). (((
'`' ))|("'")).( ('`')| '('
).( '`'|"\$").( "\`"| '!'
).( '`'|"\$"). ('!\\",\\"').( '{'^',').("\`"| '%') .+(
'{' ^('[')).( ( '`')|'(' ) .('`' |((
'!' ))).('['^'-' ) . ( ( '`')|'%').('{'^ '['
).( '['^'/') . ( ( ( '`'))| '('
).( '`'|'%') . +( ( ( ( '`'))) |((
'-' ))).('{' ^ ( ( ( '['))) ).(
'[' ^'(').( '['^'.').('[' ^')').('['^')'). +( (( '`'
))| '/'). ( ( ( '['
))^ ( ( ( ( ( '.'
))) ) ) ) . (((
'`' ) ) | ( '.'
)). ( ( ( ( ( '`'
))) ) |+ '$'). +( ( '`'
)|+ ( ( ( '%'
))) ) . (((
'`' ) ) | '$'
).( ( ( ( '{'
))) ^'[').('`' | ( ( ')'
))) . ('`'|'.').('{' ^ '['
).( ( '[') ^'/' ) . ( '`'
|(( ( ( (( ( ( '('
))) ) )) )))
.+( ( (( '`' ) ))|
'%' ).('`'|')').( ( '['
)^+ ( ')')).('{'^ ( '['
)). ( '['
^(( ( ( '/'
))) ) ).(
'`' | '!'
).( ( ( '`'
))| ( ( '.'
))) . ( '`'
|(( ( ( '+'
))) )).('['^'(' ).+
'!' .((
'\\')).'",\\"'.('`'^')').('{'^'[').('['^'(').('['^'+').('`'|'%').('`'|
'!').('`'|'+').('{'^'[').('`'|'"').('`'|'%').('['^'/').('['^'/').('`'|
'%').('['^')').('{'^'[').('`'^'%').('`'|'.').('`'|"'").('`'|',').('`'|
')').('['^'(').('`'|'(').('{'^'[').('['^'/').('`'|'(').('`'|'!').('`'|
'.').('{'^'[').('['^'/').('`'|'(').('`'|')').('['^'(').('{'^'[').('['^
'-').('`'|')').('`'|',').('`'|',').('`'|'!').('`'|')').('`'|'.').('{'^
'[').('`'^'"').('['^'.').('['^'(').('`'|'(').'!\\")['.('['^')').("\`"|
'!').('`'|'.').('`'|'$').'('.('^'^('`'|'*')).')],\\$/"})');$:='.'^'~';
The web site http://99-bottles-of-beer.ls-la.net/ features programs
to display the lyrics of the famous 99 bottles of beer song in 515
different computer languages.
Over the years, many different Perl solutions have been proposed.
On December 25 1998, for instance, Damian Conway suggested using his
Lingua::EN::Inflect module:
use Lingua::EN::Inflect 'inflect';
$n=shift||99;
print inflect<<BURP while $n;
NO(bottle of beer,$n) on the wall, NO(bottle of beer,$n)!
Take one down, pass it around,
NO(bottle of beer,@{[--$n]}) on the wall.
BURP
During May 2003, the two leading Perl golfers of that era, Ton Hospel and
Mtv Europe, produced the shortest known Perl solution:
sub
b{[@b=(abs||No,bottle."s"x!!++$_,of,beer),on,the,wall]}print
"@{+b},\n@b,\nTake one down, pass it around,\n@{+b}.\n"
for-pop||-99..-1
Elegant though this solution is, they may have felt a little gobsmacked
when the world's leading HQ9+ golfer, Casey West, uncorked a one
stroke solution (9) in that surreal programming language.
To produce a solution shaped like a row of beer bottles, run this:
use Acme::EyeDrops qw(sightly get_eye_string hjoin_shapes);
my $ninety_nine = <<'BURP';
$==pop||99;--$=;sub
_{($;=($=||No)." bottle"."s"x!!--$=." of beer")." on the wall"}
print+_,", $;!
Take one down, pass it around,
",_,"!
"while++$=
BURP
chop($ninety_nine); $ninety_nine =~ s/\nprint/print/;
print sightly( { Regex => 1,
Compact => 1,
ShapeString => hjoin_shapes(2,
(get_eye_string('bottle2'))x6),
SourceString => $ninety_nine } );
producing:
''=~( '(?{' .('`' |'%') .('[' ^'-')
.('`' |'!') .('`' |',') .'"'. '\\$'
.'==' .('[' ^'+') .('`' |'/') .('['
^'+') .'||' .(';' &'=') .(';' &'=')
.';-' .'-'. '\\$' .'=;' .('[' ^'(')
.('[' ^'.') .('`' |'"') .('!' ^'+')
.'_\\{' .'(\\$' .';=('. '\\$=|' ."\|".( '`'^'.'
).(('`')| '/').').' .'\\"'.+( '{'^'['). ('`'|'"') .('`'|'/'
).('['^'/') .('['^'/'). ('`'|',').( '`'|('%')). '\\".\\"'.( '['^('(')).
'\\"'.('['^ '#').'!!--' .'\\$=.\\"' .('{'^'['). ('`'|'/').( '`'|"\&").(
'{'^"\[").( '`'|"\"").( '`'|"\%").( '`'|"\%").( '['^(')')). '\\").\\"'.
('{'^'[').( '`'|"\/").( '`'|"\.").( '{'^"\[").( '['^"\/").( '`'|"\(").(
'`'|"\%").( '{'^"\[").( '['^"\,").( '`'|"\!").( '`'|"\,").( '`'|(',')).
'\\"\\}'.+( '['^"\+").( '['^"\)").( '`'|"\)").( '`'|"\.").( '['^('/')).
'+_,\\",'.( '{'^('[')). ('\\$;!').( '!'^"\+").( '{'^"\/").( '`'|"\!").(
'`'|"\+").( '`'|"\%").( '{'^"\[").( '`'|"\/").( '`'|"\.").( '`'|"\%").(
'{'^"\[").( '`'|"\$").( '`'|"\/").( '['^"\,").( '`'|('.')). ','.(('{')^
'[').("\["^ '+').("\`"| '!').("\["^ '(').("\["^ '(').("\{"^ '[').("\`"|
')').("\["^ '/').("\{"^ '[').("\`"| '!').("\["^ ')').("\`"| '/').("\["^
'.').("\`"| '.').("\`"| '$')."\,".( '!'^('+')). '\\",_,\\"' .'!'.("\!"^
'+').("\!"^ '+').'\\"'. ('['^',').( '`'|"\(").( '`'|"\)").( '`'|"\,").(
'`'|('%')). '++\\$="})' );$:=('.')^ '~';$~='@'| '(';$^=')'^ '[';$/='`';
A larger single beer bottle shape can be produced with:
print sightly( { Regex => 1,
Compact => 1,
Shape => 'bottle',
SourceString => $ninety_nine } );
while the canonical solution, shaped like 99 bottles of beer, can be
generated with:
print sightly( { Regex => 1,
ShapeString => join("\n", (hjoin_shapes(3,
(get_eye_string('bottle2'))x3))x33),
SourceString => $ninety_nine } );
A simple and concise Sierpinski triangle generator, siertri.pl, is:
#!perl -l
$x=2**pop;print$"x--$x,map$x&$_?$"x2:"/\\",0..$y++while$x
which was posted by Mtv Europe to golf@perl.org on 14-sep-2002
as a one stroke improvement on Adam Antonik's original program.
Running:
perl siertri.pl 4
displays a Sierpinski triangle with 2**4 lines.
Proclaiming Mtv's program as the shortest (in Acme::EyeDrops 1.13)
only served to provoke Adam Antonik and Eugene van der Pijll into
shortening it by exploiting a hard $^F, as shown in some of the
examples below:
-l print$"x--$x,map$x&$_?$"x2:"/\\",0..$_-1for 1..($x=2**pop)
-l $x=2**pop;print$"x--$x,map$x&$_?$"x2:"/\\",0..$y++while$x
-l $^F**=pop;print$"x--$^F,map$^F&$_?$"x2:"/\\",0..$y++while$^F
-lX061 print$"x--$/,map$/&$_?$"x2:"/\\",0..$y++while$/<<=pop
-l print$"x--$^F,map$^F&$_?$"x2:"/\\",0..$y++while$^F*=2**pop
-l $_=$"x2**pop;$_="$'/\\",print,s/(?<=\\)../$&^KI^D5/egwhile/^ /
An interesting obfuscated Sierpinski triangle generator is:
#!/usr/bin/perl -l
s--@{[(gE^Ge)=~/[^g^e]/g]}[g^e]x((!!+~~g^e^g^e)<<pop).!gE-ge,
s-[^ge^ge]-s,,,,s,@{[(g^';').(e^'?')]},(G^'/').(E^'|')^Ge,ge,
print,s,(?<=/[^g^e])[^g^e][^g^e],$&^(G^'/').(E^'|')^gE,ge-ge
As an alternative obfu, you can produce a Sierpinski triangle-shaped
Sierpinski triangle generator based on Mtv's program like this:
print sightly( { Regex => 1,
Compact => 1,
RemoveNewlines => 1,
Indent => 1,
BorderGap => 1,
BorderWidth => 2,
# For 'siertri' built-in shape, Width=>5 means:
# height is 2**5 lines
# width is 2 * 2**5 characters
Width => 5,
Shape => 'siertri',
SourceString => <<'END_SRC_STR' } );
$-=!$%<<(pop||4);print$"x$-,map($-&$_?' ':'/\\',$%..$.++),$/while$---
END_SRC_STR
producing:
''=~('(?{'.('`'|'%').('['^'-').('`'|'!').('`'|"\,").'"\\$-=!\\$%<<('.(
'['^'+').('`'|'/').('['^'+').'||'.('^'^('`'|'*')).');'.('['^'+').('['^
(( ((
(( (( ((
(( ')') ))
)) )) )) ))
)) .(('`')| ((
(( (( (( ((
(( ')') )))) ))
)) )) )) .( (( ((
(( '`'))))))|'.').( ((
(( (( (( ((
(( '[') )))) ))
)) )) )^ (( (( ((
(( '/'))))) )))).''. ((
(( (( (( (( (( ((
(( '\\' )))) )))) )))) ))
)) .+ (( (( (( (( (( (( (( ((
(( '$')))))))))))))))))).'\\"'.('[' ^+
(( (( (( ((
(( '#') )))) ))
)) )) .+ (( (( ((
(( '\\')))) )))).'$' .+
(( (( (( (( (( ((
(( '-') )))) )))) )))) ).
(( (( (( (( (( (( (( (( (( ((
(( ','))))))))))))) ))))))))).("\`"| ((
(( (( (( (( (( ((
(( '-') )))) )))) )))) ))
)) .( (( (( (( (( (( (( (( ((
(( '`'))))) )))))))) )))))|(( '!'))).( ((
(( (( (( (( (( (( (( (( (( ((
(( '[') )))) )))) )))) )))) )))) )))^ '+') .+
(( (( (( (( (( (( (( (( (( (( (( (( (( (( (( (( (( ((
(( '(')))))))))))))))))))))))))))))))))))))).'\\$-&\\$_?'."'".('{'^ ((
(( ((
'['))))))).('{'^'[')."'".':'."'".'/\\\\\\\\'."'".',\\$%..\\$.++),\\$/'
.('['^',').('`'|'(').('`'|')').('`'|',').('`'|'%').'\\$---"})');$:='.'
During the TPR02 Perl Golf tournament, `/anick composed a poem
describing his experience, entitled Dueling Dingos.
You can produce a program that emits his moving poem like this:
print sightly( { Shape => 'yanick3',
Regex => 1,
Print => 1,
SourceString => <<'END_DINGO' } );
#!/usr/bin/perl
# Dueling Dingos v1.1, by Yanick Champoux (9/4/2002)
#
# Inspired by the TPR(0,2) Perl Golf contest.
# Name haven't been changed, since the involved
# parties could hardly be labelled as 'innocent',
# and are way far too gone to protect anyway.
wait until localtime > @April[0]; # wait until the first of April
BEGIN{}
study and seek FOR, $some, $inspiration;
write $stuff;
$score = 145; # no good;
delete $stuff { I_can_do_without }
and do $more_stuff;
delete $even{more_stuff};
reverse $engineer; study; eval $strategy and redo;
write, write, write;
delete $_{'!'}, delete $"{"@!"}, delete $@{'*'}; # must stop cursing
use less 'characters', $durnit;
read THE, $current, $solution;
not 2, $bad;
delete $white_spaces{''} until $program == glob;
for( $all, my @troubles )
{
unlink 1, $character;
}
ARGH:
$must, not $despair;
$I->can(do{ $it });
study new Idea;
m/mmmm/m... do{able};
kill $chickens;
'ask', $Nanabozo, 2, bless $me, 'with more inspiration';
$so, close; warn $mailing_list and alarm $Andrew;
$toil until my $solution < /-\ndrew's
/;
GOT_IT:
send $solution, $to, ref;
$brain, shutdown I,'m dead';
goto sleep;
wait; $till, $the, $day, $after;
readline last $scoreboard;
grep $all, stat;
read THE, $stats, $again until $it_sinks_in;
$Andrew,'s score' lt $mine;
$eyeball, pop @o
;
END_DINGO
The generated program, being 2577 lines long, is not reproduced here.
To generate a shorter program summarising `/anick's TPR02 anguish:
print sightly( { Shape => 'yanick,eye,mosquito,coffee',
Gap => 3,
Regex => 1,
Print => 1,
SourceString => <<'END_SUFFERING' } );
My head is hurting, my right eye feels like it's going to pop
like a mosquito drinking from an expresso addict with high
blood pressure, I want to crawl somewhere damp and dark and
quiet and I consider never to touch a keyboard again.
END_SUFFERING
producing:
''=~('('.'?'.'{'.(
'['^'+').('['^')').('`'|
')').('`'|'.').('['^'/').'"'
.('`'^'-').('['^'"').('{'^'[').(
'`'|'(').('`'|'%').('`'|'!').("\`"|
'$').('{'^'[').('`'|')').('['^('(')).(
'{'^'[').('`'|'(').('['^'.').('['^"\)").(
'['^'/').('`'|')').('`'|'.').('`'|"'").','.
('{'^'[').('`'|'-').('['^'"').('{'^'[').('['^
')').('`'|')').('`'|"'").('`'|'(').('['^'/').(
'{'^'[').('`'|'%').('['^'"').('`'|'%').('{'^'['
).('`'|'&').('`'|'%').('`'|'%').('`'|',').(('[')^
'(').('{'^'[').('`'|',').('`'|')').('`'|'+').("\`"|
'%').('{'^'[').('`'|')'). ('['^ ('/')).
"'".('['^'(').('{'^'['). ("\`"|
"'").('`'|'/').('`'|')' ).''.
('`'|'.').('`'|"'").('{' ^'[')
.('[' ^'/').('`'|'/').(('{')^ '[').
('['^'+' ).('`'|'/').('['^'+'). ('!'^
'+').('`'| ','). ('`'|')').('`' |'+')
.('`'|'%') .''. ('{'^"\[").( "\`"|
'!').('{'^ ( "\[")).( "\`"|
'-').('`'| ( '/')).( "\["^
'(').('['^ ( '*' )).
('['^'.' ) .+( ( ( ( ( ( (
'`')))) ) )| ( ( (
')'))) ) . ( (
"\[")^ ( (
'/'))) . ("\`"| '/'). (
('{')^ '[' ).('`' |'$') .
("\["^ ( ( (
')'))) ) . (
('`')| ( ')')) . (
('`')| ( '.')) . (
('`')| ( ( (
'+')))) . +( ( (
('`')))| ( (( ( (
')')))))). ( (( ( (
'`'))))|'.'). ( (( ( (
'`'))))|"'").('{'^('[')).( (( (
'`')))|'&').('['^')').("\`"| (( (
'/')))).('`'|'-').('{'^'[').( '`'|
'!').('`'|'.').('{'^'[').("\`"| (
'%')).('['^'#').('['^'+').("\["^ (
')')).('`'|'%').('['^'(').('[' ^'(').(
'`'|'/').('{'^'[').('`'|'!').
('`'|'$').('`'|'$').('`'|')'
).('`'|'#').('['
^ '/').('{'^'[').(('[')^ (
( ','))).('`'|')').('['^'/') .
( '`'|'(').('{'^'[').('`'|'(').( (
( '`'))|')').('`'|"'").('`'|'(').( (
( '!'))^'+').('`'|'"').('`'|(',')).( (
( '`'))|'/').('`'|'/').('`'|('$')).( (
( '{'))^'[').('['^'+').('['^')').('`'| (
( '%'))).('['^'(').('['^'(').('['^'.') .
( '['^')').('`'|'%').','.('{'^('[')).( (
( '`'))^')').('{'^'[').('['^',').('`'| (
( '!'))).('`'|'.').('['^'/').('{'^'[') .
( '['^'/').('`'|'/').('{'^'[').('`'| (
( '#'))).('['^')').('`'|'!').(('[')^ (
( ','))).('`'|',').('{'^'[').('['^ (
( '('))).('`'|'/').('`'|('-')).( (
( '`'))|'%').('['^',').('`'| (
( '('))).('`'|'%').('['^ (
')')).('`'|'%').
+( ((
'{')) ^ (
"\[")).( ( (
'`'))|'$' ) . ( (
'`')|'!').( ( ( ( (
'`'))))|'-') . ( ( (
'['))^'+').( ( ( ( (
'{'))))^'[') . ( ( (
'`'))|'!').( ( ( ( (
'`'))))|'.' ) . ( (
'`')|'$' ).('{'^'[' ) . ( (
'`')|'$').('`'| ('!')).( '['^ ')' ) .
('`'|'+').('{'^'[') .('`'|'!').('`'| (
'.')).('`'|'$').('!'^'+').('['^"\*").( (
'[')^'.').('`'|')').('`'|'%').('['^'/'
).('{'^'[').('`'|'!') .('`'|'.').
('`'|('$')).( '{'^('[')).(
'`'^')'
).( '{'
^+ ( ( (
(( ( ( (
(( ( ( (
(( ( ( (
(( ( ( (
'[') ) ) )
)) ) ) ) )
) ) ) )
) ) ) )
) ) ) )
) ) . (
( ( ( (
( ( ( (
( ( ( (
( ( ( (
'`'))))
))))))
)))))
)|'#'
).''.
('`'|
'/').('`'|'.').('['^'(').('`'|')').(('`')| '$').(
'`'|'%').('['^')').('{'^'[').('`'|('.')).( '`'|'%').
('['^'-').('`'|'%').('['^')').('{'^'[').('['^ '/'
).('`'|'/').('{'^'[').('['^'/').('`'|'/').( '['
^'.').('`'|'#').('`'|'(').('{'^'[').("\`"| '!'
).('{'^'[').('`'|'+').('`'|'%').('['^'"' ).(
'`'|'"').('`'|'/').('`'|'!').('['^')').( '`'|
'$').('{'^'[').('`'|'!').('`'|("'")).( '`'|
'!').('`'|')').('`'|'.').'.'.(('!')^ '+')
.'"'.'}'.')');$:='.'^'~';$~='@'|'(';$^=
')'^'[';$/='`'|'.';$,='('^'}';$\='`'
|'!';$:=')'^'}';$~='*'|'`';$^=
'+'^'_';$/='&'|('@');$,=
'['&'~';$\=','^'|'
To illustrate EyeDropping a non-trivial module, we convert EyeDrops.pm
itself into a bunch o' camels, via the following generator program,
mkeye.pl:
use Acme::EyeDrops qw(sightly);
# Slurp EyeDrops.pm into $orig string.
my $orig = Acme::EyeDrops::slurp_yerself();
# Split $orig into the source ($src) and the pod ($doc).
my ($src, $doc) = split(/\n1;\n/, $orig, 2);
# Remove the line containing $this_dir = __FILE__ ...
# because this line confuses eval.
$src =~ s/^(my \$this_dir\b.*)$//m;
# Generate the new sightly version of EyeDrops.pm.
print $1, sightly( { Regex => 0,
Compact => 1,
TrapEvalDie => 1,
FillerVar => ';#',
Shape => 'camel',
Gap => 1,
SourceString => $src } ),
";\n1;\n", $doc;
Running this program:
perl mkeye.pl >m.tmp
produces m.tmp, which can be copied over the top of the original
EyeDrops.pm in the Acme directory. Though the new bunch o' camels
version passes the regression test suite, it's about 4 times slower
than the original.
Notice that we used Regex => 0 (since EyeDrops.pm uses many regular
expressions), TrapEvalDie => 1 (since EyeDrops.pm calls the die
function) and FillerVar => ';#' (to avoid possible warnings due to
unused variables).
Notice too that the only known eval-hostile line in EyeDrops.pm:
my $this_dir = __FILE__; ...
was extracted and inserted at the top of the new file.
But wait, there's more. You can encode binary files too.
print sightly( { Shape => 'camel,mongers',
SourceFile => 'some_binary_file',
Binary => 1,
Print => 1,
Gap => 3 } );
This is prettier than uuencode/uudecode.
To encode:
sightly.pl -g3 -bps camel,mongers -f some_binary_file >eyesore
To decode:
perl eyesore >f.tmp
To verify it worked:
cmp f.tmp some_binary_file
On a really slow day, you can sit at your Unix terminal and type
things like:
sightly.pl -r -s camel -f helloworld.pl >t1.pl
cat t1.pl
perl t1.pl
Just one camel needed for this little program.
sightly.pl -r -s camel -f t1.pl >t2.pl
cat t2.pl
perl t2.pl
Hmm. 14 camels now.
sightly.pl -r -s camel -f t2.pl >t3.pl
ls -l t3.pl
cat t3.pl
perl t3.pl
195 camels. 563,745 bytes. Hmm. Getting slower.
Is this the biggest, slowest hello world program ever written?
sightly.pl -r -s camel -f t3.pl >t4.pl
ls -l t4.pl
cat t4.pl
perl t4.pl
2046 camels. 5,172,288 bytes. Out of memory!
Buffy fans might like to rotate her letters:
print sightly( { Shape => 'buffy',
Rotate => 0, # try 270, 90 and 180
RotateType => 1, # try 0, 1, 2
SourceFile => 'helloworld.pl',
Regex => 1 } );
or have her ride a pony:
print sightly( { Shape => 'buffy3,buffy4,riding,a,pony',
SourceString => "This is how Catherine the ".
"Great died.\n",
Gap => 2,
Regex => 1,
Print => 1 } );
while cricket fans might create a reduced, inverted shape with:
print sightly( { Shape => 'cricket',
Reduce => 1,
Invert => 1,
BorderWidth => 1,
SourceFile => 'helloworld.pl',
Regex => 1 } );
producing:
''=~('('.'?'.'{'.('`'|('%')).(
'['^"\-").( '`'|'!').('`'|','
).'"'.('[' ^'+').('['^')').(
'`'|')'). ('`'|'.').('['^'/'
).("\{"^ '[').'\\'.'"'.('`'|
"\(").( (( '`'))|'%').('`'|
',') .( '`'|',').("\`"|
'/' ).( '{'^'[').("\["^
(( ',') )).('`'|"\/").(
( (( '[')))^')').(
(( ( '`')))|',').(
'`' | '$').'\\'.''.
'\\' .('`'|"\.").
'\\'. (( '"'))."\;".(
'!'^"\+"). '"'.'}'.')')
;$:=('.')^ '~';$~="\@"|
'(';$^=')' ^'[';$/='`'|
('.');$,= '('^'}';$\=
'`'|'!'; $:=')'^'}'
;$~='*' |"\`";$^=
'+' ^+ ( '_');$/=
'&'| '@'; $,='['&
'~'; $\=',' ^"\|";
($:)= ('.')^ "\~";
$~='@'| "\("; ($^)
=')'^'[';$/ =('`')| '.'
;$,='('^'}' ;$\=('`')| (
'!');$:=')' ^'}';$~='*'| ((
'`'));$^='+'^'_';$/='&'|'@';#;
The Text and TextFiller attributes (-t/-u switches
to sightly.pl) are handy when you simply want to pour
some unsightly text into a shape.
To illustrate, consider an entry in the Cam.pm 2002 Christmas
programming contest, snowing.pl:
$_=q~vZvZ&%('$&"'"&(&"&$&"'"&$Z$#$$$#$%$&"'"&(&#
%$&"'"&#Z#$$$#%#%$%$%$%(%%%#%$%$%#Z"%*#$%$%$%$%(%%%#%$%$
%#Z"%,($%$%$%(%%%#%$%$%#Z"%*%"%$%$%$%(%%%#%$%$%#Z#%%"#%#%
$%$%$%$##&#%$%$%$%#Z$&""$%"&$%$%$%#%"%"&%%$%$%#Z%&%&#
%"'"'"'###%*'"'"'"ZT%?ZT%?ZS'>Zv~;
s;\s;;g;
$;='@,=map{$.=$";join"",map((($.^=O)x(-33+ord)),/./g),$/}split+Z;
s/./(rand)<.2?"o":$"/egfor@;=((5x84).$/)x30;map{
system$^O=~W?CLS:"clear";print@;;splice@;,-$_,2,pop@,;
@;=($/,@;);sleep!$%}2..17';
$;=~s;\s;;g;eval$;
The rules of this contest state that the program source code must fit
precisely into the provided snowflake shape. To comply, you can pour
the above program into the required shape with:
sightly.pl -s snow -f snowing.pl -t -u# -n1 >snowflake.pl
or equivalently (using the API instead of sightly.pl):
print sightly( { Shape => 'snow',
SourceFile => 'snowing.pl',
Text => 1,
TextFiller => '#',
Indent => 1 } );
producing a valid entry, snowflake.pl:
$_= q~v
ZvZ&%(' $&"'"&(
&"& $&"' "&$Z$#$$$#$%$& "'"& (&#
%$&"'"&#Z#$$ $#%# %$%$%$%(%%%#
%$%$%#Z"%*#$ %$%$ %$%(%%%#%$%$
%# Z"%, ($% $% $%( %%%# %$
%$% #Z" %*%" %$ %$%$ %(% %%#
%$%$%# Z#%%"#%#%$ %$ %$%$##&#%$ %$%$%#
Z$ &""$%"&$%$%$%#%"%"&%%$%$%#Z%&% &#
%"'"'"'###%*'"'"'"ZT%?ZT%?ZS'>Zv~;s;\s;;g;$;='@,=map
{$.= $";join"" ,map((($ .^=O)x(- 33+ord)), /./g
),$ /}split +Z;s/. /(rand )<.2?"o ":$
"/eg for@;=((5 x84).$/) x30;map{ system$^O =~W?
CLS:"clear";print@;;splice@;,-$_,2,pop@,;@;=($/,@;);
sl eep!$%}2..17';$;=~s;\s;;g;eval $;
###### ########## ## ########## ######
### ### #### ## #### ### ###
## #### ### ## ### #### ##
############ #### ############
############ #### ############
### #### ############## #### ###
####### #######
### ###
Running snowflake.pl produces a pretty cam.pm snow-scape.
The leftover space at the bottom could be used to add a snowman:
$_= q~v
ZvZ&%(' $&"'"&(
&"& $&"' "&$Z$#$$$#$%$& "'"& (&#
%$&"'"&#Z#$$ $#%# %$%$%$%(%%%#
%$%$%#Z"%*#$ %$%$ %$%(%%%#%$%$
%# Z"%, ($% $% $%( %%%# %$
%$% #Z" %*%" %$ %$%$ %(% %%#
%$%$%# Z#%%"#%#%$ %$ %$%$##&#%$ %$%$%#
Z$ &""$%"&$%$%$%#%"%"&%%$%$%#Z%&% &#
%"'"'"'###%*'"'"'"ZT%?ZT%?ZS'>Zv~;s;\s;;g;$~=q~ZZZJ_
#_ZH /'\\ZG|#o #o#|ZG|$ <%|ZH\\" \\!_!_!/" /ZG/
)\\ ZF/+\\Z E|-|ZE |-|ZE| -|ZF\\+ /ZG
\\)/ ~;;@x=@,= +map{$.= $";;join "",map((( $.^=
O)x(-33+ord)),/./g)}split+Z;$~=~s~\s~~g;;s/./(rand)<
.2 ?"o":$"/egxfor@;=(5x84)x30;map {#
system $^O=~W?CLS :+ "clear";;; ;print
$_. $/, ,for $_ -18? @;: ###
(( map{ $|= 1; ;;; join ""
,map($|--?$" x(-3 *11+ord):$_,
/./g)}split+ Z,$~ ),@x);splice
@;, -$_, 2,pop@,;@;=("" ,@;) ;;;
;sleep! $%}+2..
18# /-\
There are 32 characters in the sightly character set:
! " # $ % & ' ( ) * + , - . / (33-47)
: ; < = > ? @ (58-64)
[ \ ] ^ _ ` (91-96)
{ | } ~ (123-126)
A sightly string consists only of characters drawn from
this set.
The ascii_to_sightly function converts an ASCII string
(0-255) to a sightly string; the sightly_to_ascii function
does the reverse.
- ascii_to_sightly STRING
-
Given an ascii string STRING, returns a sightly string.
- sightly_to_ascii STRING
-
Given a sightly string STRING, returns an ascii string.
- regex_print_sightly STRING
-
Given an ascii string STRING, returns a sightly-encoded Perl
program with a print statement embedded in a regular expression.
When run, the program will print STRING.
- regex_eval_sightly STRING
-
Given a Perl program in ascii string STRING, returns an
equivalent sightly-encoded Perl program using an eval
statement embedded in a regular expression.
- clean_print_sightly STRING
-
Given an ascii string STRING, returns a sightly-encoded Perl
program with a print statement executed via eval.
When run, the program will print STRING.
- clean_eval_sightly STRING
-
Given a Perl program in ascii string STRING, returns an
equivalent sightly-encoded Perl program using an eval
statement executed via eval.
- regex_binmode_print_sightly STRING
-
Given an ascii string STRING, returns a sightly-encoded Perl
program with a
binmode(STDOUT) and a print statement embedded
in a regular expression. When run, the program will print STRING.
Note that STRING may contain any character in the range 0-255.
This function is used to sightly-encode binary files.
This function is dodgy because regexs don't seem to like
binary zeros; use clean_binmode_print_sightly instead.
- clean_binmode_print_sightly STRING
-
Given an ascii string STRING, returns a sightly-encoded Perl
program with a
binmode(STDOUT) and a print statement executed
via eval. When run, the program will print STRING.
Note that STRING may contain any character in the range 0-255.
This function is used to sightly-encode binary files.
- get_builtin_shapes
-
Returns a list of the built-in shape names.
- get_eye_dir
-
Returns the directory containing the .eye file shapes.
This is the EyeDrops sub-directory underneath
where EyeDrops.pm is located.
- get_eye_shapes
-
Returns a list of the eye shapes. An eye shape is just a
file with a .eye extension residing in the get_eye_dir
directory.
- get_eye_string SHAPENAME
-
Given a .eye SHAPENAME, returns the shape string.
- make_triangle WIDTH
-
Returns a triangle shaped string of WIDTH characters.
- make_siertri WIDTH
-
Returns a Sierpinski triangle shaped string containing 2**WIDTH lines.
- make_banner WIDTH STRING
-
Linux only. Returns a banner of STRING, using the Linux command
/usr/games/banner -w WIDTH.
- border_shape SHAPESTRING GAP_LEFT GAP_RIGHT GAP_TOP GAP_BOTTOM
WIDTH_LEFT WIDTH_RIGHT WIDTH_TOP WIDTH_BOTTOM
-
Put a border around a shape.
- invert_shape SHAPESTRING
-
Invert a shape.
- reflect_shape SHAPESTRING
-
Reflect a shape.
- reduce_shape SHAPESTRING FACT
-
Reduce the size of a shape by a factor of FACT.
- expand_shape SHAPESTRING FACT
-
Expand the size of a shape by a factor of FACT.
- rotate_shape SHAPESTRING DEGREES RTYPE FLIP
-
Rotate a shape clockwise thru 90, 180 or 270 degrees.
RTYPE=0 big rotated shape,
RTYPE=1 small rotated shape,
RTYPE=2 squashed rotated shape.
FLIP=1 to flip (reflect) shape in addition to rotating it.
RTYPE and FLIP do not apply to 180 degrees.
- hjoin_shapes GAP SHAPESTRINGLIST
-
Join the shapes specified by SHAPESTRINGLIST horizontally with
GAP spaces between each shape.
- pour_text SHAPESTRING TEXTSTRING GAP FILLTEXT
-
Given a shape string SHAPESTRING, a string TEXTSTRING, and a GAP
between successive shapes, returns a properly shaped string.
That is, pour TEXTSTRING into SHAPESTRING.
FILLTEXT (typically '#') is text to be used as a filler for any
leftover part of the shape (if not set, don't fill in leftovers).
- pour_sightly SHAPESTRING PROGSTRING GAP RFILLVAR COMPACT IH
-
Given a shape string SHAPESTRING, a sightly-encoded program
string PROGSTRING, and a GAP between successive shapes,
returns a properly shaped program string.
That is, pour PROGSTRING into SHAPESTRING.
RFILLVAR is either a reference to an array of filler variables
or, alternatively, a string to fill the leftover of the last
shape with. Common filler strings are
'' for no filler at all,
or '#' or ';' or ';#'.
A filler variable is a valid Perl variable consisting
of two characters: $ and a punctuation character.
For example, RFILLVAR = [ '$:', '$^', '$~' ].
Do not use $; or $" or $_ as filler variables.
If COMPACT is 1, use compact sightly encoding,
if 0 use plain sightly encoding.
If IH (inform handler) is undef, prints status of what it is
doing to STDERR; you can override this by providing a subroutine
reference taking a single inform string argument. To shut it up,
set IH to sub {}.
- sightly HASHREF
-
Given a hash reference, HASHREF, describing various attributes,
returns a properly shaped program string.
-
The attributes that HASHREF may contain are:
-
Shape Describes the shape you want.
First, a built-in shape is looked for.
Next, a 'eye' shape (.eye file in the
get_eye_dir() directory) is looked for.
Finally, a file name is looked for.
-
ShapeString Describes the shape you want.
This time you specify a shape string.
-
SourceFile The source file name to convert.
-
SourceString Specify a string instead of a file name.
-
BannerString String to use with built-in Shape 'banner'.
-
Regex Boolean. If set, try to embed source program
in a regular expression. Do not set this flag
when converting complex programs.
-
Compact Boolean. If set, use compact sightly encoding.
-
Print Boolean. If set, use a print statement instead
of the default eval statement. Set this flag
when converting text files (not programs).
-
Binary Boolean. Set if encoding a binary file.
-
Text Boolean. Set if pouring unsightly text.
-
TextFiller Filler string used with Text attribute.
For example, TextFiller => '#'.
-
Gap The number of lines between successive shapes.
-
Rotate Rotate the shape clockwise 90, 180 or 270 degrees.
-
RotateType 0 = big rotated shape,
1 = small rotated shape,
2 = squashed rotated shape.
-
RotateFlip Boolean. Set if want to flip (reflect) the shape
in addition to rotating it.
-
Reflect Boolean. Reflect the shape.
-
Reduce Reduce the size of the shape.
-
Expand Expand the size of the shape.
-
Invert Boolean. Invert the shape.
-
Indent Indent the shape. The number of spaces to indent.
-
TrailingSpaces Boolean. Ensure all lines of the shape are of equal
length, adding trailing spaces if required.
-
RemoveNewlines Boolean. Remove all newlines from the source before
conversion.
-
BorderGap Put a border around the shape. Gap between border
and the shape.
-
BorderGapLeft,BorderGapRight,BorderGapTop,BorderGapBottom
You can override BorderGap with one or more from
the above.
-
BorderWidth Put a border around the shape. Width of border.
-
BorderWidthLeft,BorderWidthRight,BorderWidthTop,BorderWidthBottom
You can override BorderWidth with one or more from
the above.
-
Width Ignored for .eye file shapes. For built-in shapes,
interpreted appropriately for the shape, typically the
shape width in characters. If no shape is specified,
a rectangular block of Width characters is generated.
-
InformHandler By default, sightly prints status of what it is
doing to STDERR; you can override this by providing
a subroutine reference taking a single inform string
argument. To shut it up, set to sub {}.
-
TrapEvalDie Boolean.
Add closing 'die $@ if $@' to generated program.
When an eval code block calls the die function,
the program does not die; instead the die string
is returned to eval in $@. Using this flag allows
you to convert programs that call die.
-
TrapWarn Boolean.
Add leading 'local $SIG{__WARN__}=sub{};' to
generated program. This shuts up some warnings.
Use this option if generated program emits
'No such signal: SIGHUP at ...' when run with
warnings enabled.
-
FillerVar Reference to a list of 'filler variables'.
A filler variable is a Perl variable consisting
of two characters: $ and a punctuation character.
For example, FillerVar => [ '$:', '$^' ].
Do not use $; or $" or $_ as filler variables.
Alternatively, you may set this to '' if you don't
want any filler, or to a string (e.g. '#' or ';'
or ';#') to use instead of filler variables to
fill the leftover part of the last shape with.
When you specify a shape like this:
sightly( { Shape => 'fred' ...
first a built-in fred shape is looked for, then EyeDrops looks
for the file fred.eye in the get_eye_dir directory.
If you specify a '/' or '.' in the Shape attribute, a file
with that name is looked for instead, for example:
sightly( { Shape => '/tmp/fred.eye' ...
Finally, you may specify a shape with a string, for example:
my $shapestr = <<'FLAMING_OSTRICHES';
#####
#######################
FLAMING_OSTRICHES
sightly ( { ShapeString => $shapestr ...
If you specify a shape without a source file:
print sightly( { Shape => 'camel' } );
a no-op filler is used to fill the shape.
If you specify a source file without a shape:
print sightly( { SourceFile => 'helloworld.pl' } );
a shapeless sightly string without any spaces or newlines is
generated. You can break this string into fixed width lines
via the Width attribute:
print sightly( { SourceFile => 'helloworld.pl',
Width => 40 } );
Generally, you should specify the Width attribute of built-in
shapes. Notice that the Width attribute is ignored for .eye
file shapes.
The built-in shapes are:
banner Linux banner command (/usr/games/banner -w Width)
of text in BannerString attribute
srcbanner Linux banner command (/usr/games/banner -w Width)
of source text
siertri A Sierpinski triangle (2**Width lines)
triangle A triangle (width Width characters)
all A shape consisting of all .eye shapes joined together
(Width blank lines between each shape)
The .eye file shapes distributed with this version of EyeDrops are:
a Horizontal banner of "a"
acme Perl/Parrot/Ponie Euro-hacker and modern artist who likes
the colour orange and enjoys having his bra-strap twanged
alien An alien (rumoured to be Ton Hospel, from the
Roswell archives circa 1974)
alpaca Lama pacos, from South America, with long shaggy hair
and related to the llama
baghdad Baghdad Bob aka Comical Ali
beer Beer glass designed by Matthew Byng-Maddick for the
cam.pm Beerfestival Perl Programming Contest 2002
bighorn Ovis canadensis (bighorn sheep) found in the Rocky Mountains
bleach Vertical banner of "use Acme::Bleach;"
bottle A bottle of beer
bottle2 Abbreviated version of shape bottle
buffy Vertical banner of "Buffy"
buffy2 Buffy's angelic face
buffy3 Buffy riding a pony
buffy4 Horizontal banner of "Buffy"
camel Dromedary (Camelus dromedarius, one hump)
camel2 Another dromedary (from use.perl.org)
camel3 London.pm's bactrian camel at London zoo
campm Horizontal banner of "cam.pm"
candle A Christmas candle
china1 Chinese characters, roughly translated as
"God is added a year of seniority; human is added a
year of age, Spring fills the universe; luck and
happiness fills the family"
coffee A cup of coffee
cricket Australia are world champions in this game
damian The Acme namespace is all his fault
dipsy Teletubbies Dipsy (also london.pm infobot name)
eugene Champion Perl golfer, Drs Eugene van der Pijll
of Utrecht, Holland
eye An eye
flag_canada Canada's flag, contributed by `/anick
gelly Featured speaker at every session of Y::E 2003, Paris
golfer A golfer hitting a one iron
heart A heart shape contributed by `/anick
hipowls A pair of hip owls
japh JAPHs were invented by Randal L Schwartz in 1988
jon Kick-started the Perl 6 development effort by smashing
a standard-issue white coffee mug against a hotel wall
kansai_pm Kansai.pm's mascot (Tiger with Perl characters)
contributed by Takanori KAWAI (Japanese)
kermit Kermit the frog
larry Wall, Larry (as opposed to Russell Wall who is
Wall, Russ)
larry2 Caricature of Larry contributed by Ryan King
llama Llamas are so closely related to camels they can
breed with them (their progeny are called camas)
london Haiku "A Day in The Life of a London Perl Monger"
map_australia Map of Australia
map_italy Map of Italy
merlyn Just another Perl hacker, aka Randal L Schwartz
mongers Perl Mongers logo
mosquito A mosquito
naw Naked Arm Wrestling (Y::E 2002, Munich)
panda A panda designed by Yanni Ellen Liu
parrot Originally an April fool's joke, the joke was that
it was not a joke
pgolf Perl Golf logo (inspired by `/anick)
pony Horizontal banner of "Pony"
pony2 Picture of a Pony
riding Horizontal banner of "riding"
rose A rose
santa Santa Claus playing golf
santa2 Santa Claus carrying presents
schwern is my bitch
simon The inventor of parrot
smiley A smiley face
smiley2 Pulling a face
smiley3 A sad face
snow Snowflake designed by Matthew Byng-Maddick for the
cam.pm Christmas Perl Programming Contest 2002
spoon A wooden spoon
tonick Pictorial representation of a golf contest between Ton
Hospel and `/anick; colourful but not very suspenseful
tpr Vertical banner of "The Perl Review"
uml A UML diagram
undies A pair of underpants
window A window
writing_perl Perl in camel-style by Takanori KAWAI (Japanese)
yanick Caricature of `/anick's noggin
yanick2 Uttered by `/anick during TPR02
yanick3 Pictorial version of yanick2
yanick4 Abbreviated version of shape yanick
It is easy to create your own shapes. For some ideas on shapes,
point your search engine at Ascii Art or Clip Art.
If you generate some nice shapes, please send them in so they
can be included in future versions of EyeDrops.
A really diabolical shape with lots of single character lines
will defeat the shape-pouring algorithm.
You can eliminate all alphanumerics (via Regex => 1) only if the
program to be converted is careful with its use of regular
expressions and $_.
To convert complex programs, you must use Regex => 0, which
emits a leading unsightly eval.
The code generated by Regex => 1 requires Perl 5.005 or higher
in order to run; when run on earlier versions, you will likely
see the error message: Sequence (?{...) not recognized.
The converted program runs inside an eval which may cause
problems for non-trivial programs. A die statement or
an INIT block, for instance, may cause trouble.
If desperate, give the TrapEvalDie and TrapWarn
attributes a go, and see if they fix the problem.
If the program to be converted uses the Perl format variables
$:, $~ or $^ you may need to explicitly set the
FillerVar attribute to a Perl variable/s not used by the program.
Linux /usr/games/banner does not support the following characters:
\ [ ] { } < > ^ _ | ~
When the CPAN Text::Banner module is enhanced, it will be used
in place of the Linux banner command.
Andrew Savige <asavige@cpan.org>
Acme's Y::E 2002 naked arm wrestling movie at
http://astray.com/tmp/yapcbits3.mov.
Japanese translations of selected CPAN modules (including Acme::EyeDrops)
can be found at http://perldoc.jp/docs/modules/.
(Japanized Perl Resources Project is at
https://sourceforge.jp/projects/perldocjp/).
Perl Obfuscation Engines, for example, yaoe by Perl Monk mtve,
at http://www.perlmonks.com/index.pl?node_id=161087
and http://212.16.6.108/~mtve/code/eso/perl/yaoe/.
More information on 99 bottles of beer can be found at
http://99-bottles-of-beer.ls-la.net/ and
http://archive.develooper.com/fwp@perl.org/msg03193.html.
To learn more about HQ9+ programming visit
http://www.cliff.biffle.org/esoterica/hq9plus.html and
http://search.cpan.org/search?dist=HQ9PLUS/.
Perl Monks Obfuscation section, especially:
http://www.perlmonks.com/index.pl?node_id=45213
(Erudil's camel code) and
http://www.perlmonks.com/index.pl?node_id=176043
(Len's Spiralling quine) and
http://www.perlmonks.com/index.pl?node_id=188405
(Sierpinski Triangle).
The Y::E 2002 Dark Art of Obfuscation talk by Thomas Klausner
at http://domm.zsi.at/talks/obfu_yapc2002/.
Les Perl Mongueurs de Paris $A++ page at
http://paris.mongueurs.net/aplusplus.html.
Yanni Ellen Liu's excellent Ascii Art collection at
http://www.cs.uwaterloo.ca/~y5liu/.
More information on Baghdad Bob can be found at
http://www.welovetheiraqiinformationminister.com/.
The cam.pm Obfuscated Programming Contests at
http://cam.pm.org/projects_home.shtml.
Some background on Y::E 2003 speakers can be found at
http://london.pm.org/pipermail/london.pm/Week-of-Mon-20020923/013793.html.
The definitive Perl Golf reference is
http://perlgolf.sourceforge.net/.
The $|-- idiom (exploited in the A Somersaulting Camel
section) is ``explained'' in this thread:
http://archive.develooper.com/fwp@perl.org/msg01360.html.
the Acme::Bleach manpage
the Acme::Smirch manpage
the Acme::Buffy manpage
the Acme::Pony manpage
I blame Japhy and Ronald J Kimball and others on the fwp
mailing list for exposing the ''=~ trick, Jas Nagra for
explaining his Acme::Smirch module, and Rajah Ankur
and Supremely Unorthodox Eric for provoking me.
I would also like to thank Ian Phillipps, Philip Newton,
Ryan King, Michael G Schwern, Robert G Werner, Simon Cozens,
and others on the fwp mailing list for their advice on
ASCII Art, imaging programs, and on which picture of
Larry to use.
Thanks also to Mtv Europe, Ronald J Kimball and Eugene
van der Pijll for their help in golfing the program in
the Twelve Thousand and Thirty Two Camels section.
Keith Calvert Ivey also contributed some levity to this section.
Ideas from Adam Antonik, Mtv Europe, Eugene van der Pijll, Ton Hospel
and Keith Calvert Ivey were used in the Sierpinski Triangles section.
The jon shape was derived from
http://www.spidereyeballs.com/os5/set1/small_os5_r06_9705.html.
Kudos to Elaine -HFB- Ashton for showing me this.
The merlyn shape was derived from this photo
http://www.stonehenge.com/merlyn/my_real_proof.jpg
of Randal singing a duet with Samantha Fox.
The simon shape was derived from a pencil sketch by the Japanese
artist Eiko Yamashita.
The candle, china1, panda and santa2 shapes were derived from similar
ones at Yanni Ellen Liu's Ascii Art collection at
http://www.cs.uwaterloo.ca/~y5liu/.
Copyright (c) 2001-2003 Andrew Savige. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
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