在 Perl 中循环遍历哈希数组 [英] Looping through an array of hashes in Perl

问题描述

我完全是 Perl 新手，所以如果这真的很愚蠢，请原谅我，但我无法弄清楚这一点.如果我有这样的数组:

I'm a total Perl newbie, so forgive me if this is really stupid, but I can't figure this out. If I have an array like this:

my @array = (
  {username => 'user1', email => 'user1@email' },
  {username => 'user2', email => 'user2@email' },
  {username => 'user2', email => 'user3@email' }
);

遍历这个数组最简单的方法是什么?我认为这样的事情会奏效:

What's the most simple way to loop through this array? I thought something like this would work:

print "$_{username} : $_{email}\n" foreach (@array);

但事实并非如此.我想我太沉迷于 PHP 思维方式了，我可以这样做:

But it doesn't. I guess I'm too stuck with a PHP mindset where I could just do something like:

foreach ($array as $user) { echo "$user['username'] : $user['email']\n"; }

推荐答案

@array包含hashreferences，所以需要使用->代码>取消引用.

@array contains hash references, so you need to use -> to derefecence.

print "$_->{username} : $_->{email}\n" foreach (@array);

另见文档，例如 perldoc perlreftut 和 perldoc perlref.

See also the documentation, for instance perldoc perlreftut and perldoc perlref.

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