Question

我使用JSON::Parse解码json文件。当我将它转储到文件时，它看起来像下面打印。我需要提取＆＃39; url＆＃39;来自每个存储库。我怎么能这样做呢？我试图访问元素，但似乎无法访问它们。有什么建议吗？

我如何解码.json文件：

my $json_hash_ref = {};
$json_hash_ref= json_file_to_perl ($REPO_JSON_FILE) or confess "No repos found";

这是数据转储：

$VAR1 = {
      'repositories' => [
                        {
                          'size' => 2970,
                          'watchers' => 49,
                          'created_at' => '2012-03-20T05:04:42Z',
                          'url' => 'http://github.cerner.com/aeon-core/aeon-topology',
                          'open_issues' => 0,
                          'followers' => 49,
                          'owner' => 'aeon-core',
                          'has_downloads' => 1,
                          'has_issues' => 0,
                          'language' => 'Java',
                          'pushed' => '2014-06-17T18:32:37Z',
                          'private' => ${\$VAR1->{'repositories'}[0]{'has_issues'}},
                          'name' => 'aeon-topology',
                          'score' => '1',
                          'has_wiki' => ${\$VAR1->{'repositories'}[0]{'has_issues'}},
                          'pushed_at' => '2014-06-17T18:32:37Z',
                          'description' => '',
                          'username' => 'aeon-core',
                          'created' => '2012-03-20T05:04:42Z',
                          'homepage' => '',
                          'forks' => 59,
                          'fork' => ${\$VAR1->{'repositories'}[0]{'has_issues'}},
                          'type' => 'repo'
                        }, 
                        {
                         .....
                        },...

Answer 1

my @urls = map $_->{url}, @{ $json_hash_ref->{repositories} };

有关遍历深层数据结构的详细信息，请阅读perl references tutorial。

如何在perl中解析复杂的hash ref？

1 个答案: