Data::Dumper Module

Data::Dumper module对有些输出比较有用，比如hash，或者没有赋值的变量。

 

==脚本dumper_1.pl==

#!/usr/bin/perl -w
#
# dumper_1.pl
# Use of Data::Dumper module

use strict;
use Data::Dumper;

my  $v1='abc';
my $v2=22;
my  $v3;
my @array1=('unit1','part2',33,'four');
my %hash1=("Tom",89,"Jack",67,"Samio",77,"aa",69);

 

print Dumper($v1);
print Dumper($v2);
print Dumper($v3);
print Dumper(/@array1);
print Dumper(/%hash1);

 

==执行结果==

C:/temp1>perl dumper_1.pl
$VAR1 = 'abc';
$VAR1 = 22;
$VAR1 = undef;
$VAR1 = [
          'unit1',
          'part2',
          33,
          'four'
        ];
$VAR1 = {
          'Jack' => 67,
          'aa' => 69,
          'Samio' => 77,
          'Tom' => 89
        };