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### Laziness, Impatience, and Hubris

by grep (Monsignor)
 on Mar 07, 2002 at 07:34 UTC Need Help??

#!/usr/bin/perl
use strict;map{$a++} ('g','r','e','p') ;$a=$a-$a--+$a++;$a++;$b=int (rand($a));$b++;map{chomp;@INC =split(/\D/);push(@_,(int($INC
[$b]/$b),int($INC[$b+$a]/$b)))
;}(<DATA>);map{printf("%c",$_)}@_; __DATA__ L076I146H216a097m218u351 z122p224b294i105a194r342 n110t232i315e101i210s345 s115e202(096s115n220#096 &032c198$096^032e202)096
^032#064?096<010>020\030
[download]

UPDATE: some small changes to muck it up a bit more

grep
 grep> cd /pubgrep> more beer

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Solution: Laziness, Impatience, and Hubris
by domm (Chaplain) on Mar 08, 2002 at 21:20 UTC
use strict;
Enable strict mode. There are no errors because of undefined vars because you used $a and$b, which are always defined, as they are used by sorting.
For the same reason, you choose @INC;

map{$a++}('g','r','e','p'); You set$a to 4.

$a=$a-$a--+$a++;
or written a little bit cleaner
$a=$a - $a-- +$a++;

But still rather hard to understand, because of the way auto-in/decrement worksin suffix mode:
What happens is (if I got it right):
$a=$a - $a-- +$a++;
$a is now 3, but 4 is substracted $a=3 - 4 + $a++; $a=-1 + $a++;$a is incremented to 4, but 3 (the old value) is used in the addition
$a= -1 + 3$a is now 2

$a++; And now its 3 $b=int(rand($a)); sets$b to a value between 0 and 2.

$b++ increments it by one, so it is now 1, 2, or 3. Used to decide which virtue to print. map {chomp;@INC=split(/\D/);push(@_,(int($INC$b/$b),
int($INC$b+$a/$b)));}(<DATA>);
Here you map over all elements of the DATA array, doing the following things:
chomp;
remove the line brake at the end of the line
@INC=split(/\D/);
Set @INC, by splitting the current line on non-numeric values, thereby removing all charaters from the stuff in DATA. This made me wonder, because first I thought you where using the characters hidden between the numbers as your data. But, as I then found out, you just tossed me a red herring that I gullibly swalloed.
push(@_,(int($INC$b/$b),int($INC$b+$a/$b))) Now you modify your data structure. In the DATA-section, you stored the ascii values of each character (multiplied by either 1,2 or 3), like so (using the real characters): LIHamu (and these are NOT the 'L', the 'I', the 'H' etc you can see in the DATA section). With this code segment, you first get item number$b (and divide by $b, so it is now the real ascii value), then you get$b+$a. As$a is 3, this gets the next value of the selected virtue. The shorter virtues are space-padded at the end.

map{printf("%c",$_)}@_; Here you finally map over all values of @_, printing the character with the ascii value of$_. A nice way to prevent the much-overused chr. Voila.

Nice work! Especially as it's not just one more japh.

I espcially liked the auto-in/decrement stuff and the wrong track you laid in DATA.

--
#!/usr/bin/perl -w just another perl hacker
print+seek(DATA,$=*.3,@-)?~~<DATA>:$:__DATA__


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