#!/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(jié)果為Kubrick 
print $movies{'The Shining'}; 

#同時(shí)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(jié)構(gòu)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(dāng)哈希結(jié)構(gòu)用于列表環(huán)境中時(shí)，perl會將hash重新變?yōu)橛申P(guān)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(shù)組是一個(gè)分為奇數(shù)為film，偶數(shù)為director的數(shù)組，或者相反 
#然后我們將數(shù)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";