复杂的数据结构

wpeng18

我有一个比较复杂的数据结构
$hash{$file}{$cnt}
请问这个hash如何打印出来呢？
谢谢帮忙

helbreathszw

use Data:umper;
print Dumper($hash);

wrongdna

原帖由 helbreathszw 于 2007-1-23 11:35 发表
use Data:umper;
print Dumper($hash);

print Dumper(%hash);
会更好一点：）

ulmer

Hi,
to FL.1:

$hash{$file}{$cnt}

This data structure called hash of hash, which means a normal hash contains
a reference to hash. For example:

1. 
   
2. %hash = (                      # normal hash
   
3.     'file' => {'cnt'=> 99},    # ref. hash
   
4.     # more data ...
   
5. );
   
6. # call
   
7. print $hash{file}{cnt};
   
8. # or
   
9. print $hash{file}->{cnt};
   
10. # or
    
11. use Data::Dumper;
    
12. print Dumper(\%hash);    # you will see a clear data strucure.
    

复制代码

to FL.2

use Data:Dumper;
print Dumper($hash);

This is a blind Dumper!!!
if so, %hash must be defined as reference to hash.
$hash = {file => {cnt=>999}};
# call
print $hash->{file}->{cnt};  


to FL. 3

use Data:umper;
print Dumper(%hash);

Still better: print Dumper(\%hash);

--ulmer

helbreathszw

use Devel:eek;
%hash = (                      # normal hash
    'file' => {'cnt'=> 99},    # ref. hash
    'file2' => {'cntd'=> 88},    # ref. hash

# more data ...
);
print Dump(\%hash);

this is better than FL.4

helbreathszw

总算来了个识货的，那我也抖搂抖搂