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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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