在以下代码中,当打印数组的内容时,hash3的key3没有所需的值(我想要实现的是hashref1在key3中有一个数组, hashref2在key3中拥有value2的数组)。在多重散列中使用的阵列参数的元素未显示
在代码流中,我需要首先填充hashrefs,然后将数据推送到子数组。
如果使用引用子数组是正确的方式去这里,你可以请指教吗?
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
my @array;
my @subarray;
# Puash to array
my $hashref1 = {
key1 => 'value1_1',
key2 => 'value1_2',
key3 => \@subarray
};
push (@array, $hashref1);
# push some data in subarray
push (@subarray, 'value1');
# clear subarray
splice(@subarray);
# Puash to array
my $hashref2 = {
key1 => 'value2_1',
key2 => 'value2_2',
key3 => \@subarray
};
push (@array, $hashref2);
# push some data in subarray
push (@subarray, 'value2');
print "hashref1:\n".Dumper($hashref1);
print "hashref2:\n".Dumper($hashref2);
print "array:\n".Dumper(@array);
出来:
hashref1:
$VAR1 = {
'key2' => 'value1_2',
'key1' => 'value1_1',
'key3' => [
'value2'
]
};
hashref2:
$VAR1 = {
'key2' => 'value2_2',
'key1' => 'value2_1',
'key3' => [
'value2'
]
};
array:
$VAR1 = {
'key2' => 'value1_2',
'key1' => 'value1_1',
'key3' => [
'value2'
]
};
$VAR2 = {
'key2' => 'value2_2',
'key1' => 'value2_1',
'key3' => $VAR1->{'key3'}
};
顺便说一句,'自卸车(@array)'应该是'自卸车(\ @阵列)'。将数组或哈希传递给'Dumper'是没有意义的。 – ikegami 2013-03-08 17:42:29