我一直在尝试在Perl中阅读以下结构:
my %Homes = (
"Home 1" => [
'TYPE_OF_HOUSE' => "Villa",
'FIELD1' => ["1","2","3"],
'Field2' => ["2","3","4"],
'Field3' => ["3","4","5"],
],
"Home 2" => [
'TYPE_OF_HOUSE' => "Duplex",
'FIELD1' => ["1","2","3"],
'Field2' => ["2","3","4"],
'Field3' => ["3","4","5"],
],
"Home 3" => [
'TYPE_OF_HOUSE' => "Apartment",
'FIELD1' => ["1","2","3"],
'Field2' => ["2","3","4"],
'Field3' => ["3","4","5"],
],
);
通过使用以下内容:
my @data_Array;
my ($inner_Key,$key,$names_ref);
foreach $key (keys %Homes)
{
print("Inner values of house $key are:");
foreach $inner_Key ( @{$Homes{$key}})
{
if ($inner_Key != "TYPE_OF_HOUSE")
{
$names_ref = @$inner_Key;
@data_Array = @{$names_ref};
print($data_Array[0]);
print($data_Array[1]);
print($data_Array[2]);
}
else
{
print($inner_Key);
}
}
}
我成功地打印了:"Home 1"、"Home 2",但是当尝试读取内部内容时,即使我使用了对数组的引用,它也不顺利。我错过了什么? 我的目标是"识别"字段的类型,如果它是TYPE_OF_HOUSE
,那么只需打印它,因为它不是一个数组。否则,打印其数组的内部内容。
你必须使用strict
和warnings
,因为它们会告诉你很多关于你的代码有什么问题。
比较字符串时,需要使用ne
而不是!=
。
应使用不同的数据结构,以便更轻松地访问内部数据元素。 你有一个数组的哈希,但它作为哈希的哈希更有意义。 通过使用=>
表示'TYPE_OF_HOUSE' => "Villa"
,你已经欺骗自己相信这是一个哈希。 但是,它只是一个平面数组。 数组的第一个元素是TYPE_OF_HOUSE
,第二个元素是Villa
的,第三个是FIELD1
的,第四个是数组引用,依此类推。
use warnings;
use strict;
my %Homes = (
"Home 1" => {
'TYPE_OF_HOUSE' => "Villa",
'FIELD1' => [ "1", "2", "3" ],
'Field2' => [ "2", "3", "4" ],
'Field3' => [ "3", "4", "5" ],
},
"Home 2" => {
'TYPE_OF_HOUSE' => "Duplex",
'FIELD1' => [ "1", "2", "3" ],
'Field2' => [ "2", "3", "4" ],
'Field3' => [ "3", "4", "5" ],
},
"Home 3" => {
'TYPE_OF_HOUSE' => "Apartment",
'FIELD1' => [ "1", "2", "3" ],
'Field2' => [ "2", "3", "4" ],
'Field3' => [ "3", "4", "5" ],
},
);
my @data_Array;
my ( $inner_Key, $key, $names_ref );
foreach $key ( keys %Homes ) {
print("Inner values of house $key are:");
print "n";
foreach $inner_Key ( keys %{ $Homes{$key} } ) {
if ( $inner_Key ne "TYPE_OF_HOUSE" ) {
@data_Array = @{ $Homes{$key}{$inner_Key} };
print( $data_Array[0] );
print "n";
print( $data_Array[1] );
print "n";
print( $data_Array[2] );
print "n";
}
else {
print($inner_Key);
print "n";
}
}
}
我使用perltidy
来改善缩进。 我添加了换行符,以使您的print
输出更易于阅读。