Comments on: Autovivification bit me today

By: b

Thu, 28 May 2009 01:06:40 +0000

I like

return if $hashref and exists $hashref->{something};

much better than counting the keys.

lwsitu — Wed, 27 May 2009 23:44:57 +0000

you don’t need to use scalar keys, just using a hash in scalar context would work as well

Laufeyjarson — Wed, 27 May 2009 20:55:58 +0000

I was following the advice from http://www.perlmonks.org/?node_id=173677 which points out that not all tied hashes behave properly in those situations.

In my specific case, it would have been fine, but in the general case it might not always work.

matt — Wed, 27 May 2009 15:10:44 +0000

you shouldn’t need scalar keys
my $hashref = {};
return if exists $hashref->{something};
load_hashref($hashref) unless %$hashref;

Pedro Melo — Wed, 27 May 2009 06:42:25 +0000

The last line can even be simpler:

load_hashref($hashref) unless %$hashref;

Best regards,