ch09.067_best

来自「Perl Best Practices the source code」· 067_BEST 代码 · 共 38 行

##############################################################################
##   Code fragment (Recommended) from Chapter 9 of "Perl Best Practices"    ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;

my @sheep = (2,4,6,8,10);
my @goats = (1,3,5,7,9);

sub swap_arrays {
    my ($array1_ref, $array2_ref) = @_;
 
    my @temp_array = @{$array1_ref};
    @{$array1_ref} = @{$array2_ref};
    @{$array2_ref} = @temp_array;
 
    return;

}
 
# and later...
 
swap_arrays(\@sheep, \@goats);      # Explicitly pass references

use Data::Dumper 'Dumper';
warn Dumper [ 'SHEEP', @sheep ];
warn Dumper [ 'GOATS', @goats ];