Looping through an array of hashes in Perl

Question

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' }
);

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

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

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"; }

mscha · Accepted Answer · 2011-01-20 13:32:30Z

28

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

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

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

edited Jan 20, 2011 at 13:32

answered Jan 20, 2011 at 13:27

mscha

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2 Comments

Ricky Over a year ago

Oh god, I feel so dumb now. Thank you!

Eric Strom Over a year ago

also could be written say "$$_{username} : $$_{email}" for @array;

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