#!/bin/perl
use strict; 
use warnings; 

my %movies; 
my $film; 
my %reverse_result; 
my $director; 
my @data; 

%movies = 
( 
  'The Shining'       => 'Kubrick', 
  'Ten Commandments'  => 'DeMille', 
  'Goonies'           => 'Spielberg', 
); 

#輸出哈希的值，輸出的結果為Kubrick 
print $movies{'The Shining'}; 

#同時輸出鍵和值 
foreach $film(keys %movies) 
{ 
   print "$film was directed by $movies{$film}./n"; 
} 

#添加空格 
print "/n"; 

#哈希結構的切換 
%reverse_result=reverse %movies; 
foreach $director(keys %reverse_result) 
{ 
   print "$director directe the $reverse_result{$director}./n";  
}

#添加空格 
print "/n";

#當哈希結構用于列表環境中時，perl會將hash重新變為由關鍵詞和鍵值組成的普通列表 
@data=%movies; 
 print "@data/n"; 

#添加空格 
print"/n"; 

#得到的數組是一個分為奇數為film，偶數為director的數組，或者相反 
#然后我們將數組賦值給hash 
%movies=@data; 
foreach $director(keys %reverse_result) 
{ 
  print "$director directe the $reverse_result{$director}./n";  
}     
print "The result is not change/n";