Need help pulling in library sub to shuffle deck of cards

[l1nuxxx]

I have a file well call file.pl. It's a card sorting program. I need to create a lib fuction with part of the original file that shuffles the deck of cards. After it shuffles the first deck and deals a hand of cards I need it to call the shuffling function again before dealing another hand. I call the lib function file file-lib.pl.

here's the contents i have for file.pl

#!/usr/bin/perl

require 'file-lib.pl';
my @startingdeck = ("A H","2 H","3 H","4 H","5 H","6 H","7 H","8 H",
                 "9 H","10 H","J H","Q H","K H",
                 "A D","2 D","3 D","4 D","5 D","6 D","7 D","8 D",
                 "9 D","10 D","J D","Q D","K D",
                 "A C","2 C","3 C","4 C","5 C","6 C","7 C","8 C",
                 "9 C","10 C","J C","Q C","K C",
                 "A S","2 S","3 S","4 S","5 S","6 S","7 S","8 S",
                 "9 S","10 S","J S","Q S","K S");
push@startingdeck, @startingdeck;
print "@startingdeck[0..4]\n"

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And here are the contents for file-lib.pl

sub shuffle(){
for my $x(0..99){
my @shuffle = (
  shift(@startingdeck),
  pop(@startingdeck),
  shift(@startingdeck),
  pop(@startingdeck),
  shift(@startingdeck),
  pop(@startingdeck),
  shift(@startingdeck),
  pop(@startingdeck),
);
 }
}
1;

i realize some of this may not be what is considered good perl programming techniques. But I merely just want it to work.

[KevinADC]

If the object is to shuffle the deck you can use List::Util and call its shuffle function.

http://search.cpan.org/~gbarr/Scalar-List-Utils-1.19/lib/List/Util.pm

Or is this school work?

[l1nuxxx]

Not school work. Can u show me how it should look?

[Ganon11]

A simple example of List::Util::shu ffle:

use List::Util qw/shuffle/;

my @sorted_list = (1..100);
my @unsorted_list = shuffle(@sorted_list);

print @unsorted_list, "\n"; # Will print 1-100 in some random order

[l1nuxxx]

can u show me how my code should look if i didn't want to use List::Util::shu ffle:

[KevinADC]

can u show me how my code should look if i didn't want to use List::Util::shu ffle:

Your code will not shuffle the array. Don't even bother with it unless you meant something else besides shuffling.

Look here:

http://perldoc.perl.org/perlfaq4.html#How-do-I-shuffle-an-array-randomly%3f

Use the Fisher-Yates shuffle example to shuffle your array. If you still need help, post the code you tried to write using the Fisher-Yates example.

[l1nuxxx]

From my original program below I want to remove the code that does the shuffling and include it as a function in let's say mylibfile.pl. Then from myfile.pl using (require 'mylibfile.pl') do the following. Deal a hand of cards then call the shuffling function again before dealing another, different hand.

(myfile.pl)

my @startingdeck = ("A H","2 H","3 H","4 H","5 H","6 H","7 H","8 H", 
                 "9 H","10 H","J H","Q H","K H", 
                 "A D","2 D","3 D","4 D","5 D","6 D","7 D","8 D", 
                 "9 D","10 D","J D","Q D","K D", 
                 "A C","2 C","3 C","4 C","5 C","6 C","7 C","8 C", 
                 "9 C","10 C","J C","Q C","K C", 
                 "A S","2 S","3 S","4 S","5 S","6 S","7 S","8 S", 
                 "9 S","10 S","J S","Q S","K S"); 
for my $x(0..99){ 
my @shuffle = ( 
  shift(@startingdeck), 
  pop(@startingdeck), 
  shift(@startingdeck), 
  pop(@startingdeck), 
  shift(@startingdeck), 
  pop(@startingdeck), 
  shift(@startingdeck), 
  pop(@startingdeck), 
);
push@startingdeck, @startingdeck; 
print "@startingdeck[0..4]\n"

[KevinADC]

Well, that wasn;t much of an effort on your part. Here it is, next time I hope to see you at least try.


myfile.pl:

use strict;
use warnings;
require mylibfile.pl;#<--assumes it is in the same folder as myfile.pl

my @deck = ("A H","2 H","3 H","4 H","5 H","6 H","7 H","8 H", 
"9 H","10 H","J H","Q H","K H", 
"A D","2 D","3 D","4 D","5 D","6 D","7 D","8 D", 
"9 D","10 D","J D","Q D","K D", 
"A C","2 C","3 C","4 C","5 C","6 C","7 C","8 C", 
"9 C","10 C","J C","Q C","K C", 
"A S","2 S","3 S","4 S","5 S","6 S","7 S","8 S", 
"9 S","10 S","J S","Q S","K S");

my @shuffled = shuffle(\@deck);
print "@shuffled[0..4]";#<-- demonstration only

mylibfile.pl:

use strict;
use warnings;

sub shuffle {
   my $deck = shift;
   my $i = @$deck;
   while (--$i) {
      my $j = int rand ($i+1);
      @$deck[$i,$j] = @$deck[$j,$i];
   }
   return @{$deck};
}
1;#<--keep this here

just call the shuffle() function as needed to reshuffle the deck.

[l1nuxxx]

thanks for the help. ............... ............... ..........