?? queue.pm
字號:
#!/usr/bin/perl
# Fig. 14.22: Queue.pm
# Implementation of queue using a tied scalar.
package Queue;
use strict;
use warnings;
sub TIESCALAR
{
my ( $class ) = shift();
my @data = split( ' ', $_[ 0 ] );
bless( \@data, $class );
return \@data;
}
sub STORE
{
my $obj = shift();
my $data = shift();
push( @$obj, $data );
}
sub FETCH
{
my $obj = shift();
return shift( @$obj );
}
return 1;
###########################################################################
# (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall. #
# All Rights Reserved. #
# DISCLAIMER: The authors and publisher of this book have used their #
# best efforts in preparing the book. These efforts include the #
# development, research, and testing of the theories and programs #
# to determine their effectiveness. The authors and publisher make #
# no warranty of any kind, expressed or implied, with regard to these #
# programs or to the documentation contained in these books. The authors #
# and publisher shall not be liable in any event for incidental or #
# consequential damages in connection with, or arising out of, the #
# furnishing, performance, or use of these programs. #
###########################################################################
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