Thanks Uri and Jepp,
that was exactly the information I was looking for.
----- Original Message -----
From: "Uri Guttman" <u...@stemsystems.com>
To: "Jeff Pang" <jeff_p...@sina.com>
Cc: beginners@perl.org
Sent: Sunday, October 31, 2010 6:39:50 PM GMT +01:00 Amsterdam / Berlin / Bern
/ Rome / Stockholm / Vienna
Subject: Re: anonymous hash reference
>>>>> "JP" == Jeff Pang <jeff_p...@sina.com> writes:
JP> print check_for_exists('name','foo');
JP> sub check_for_exists {
JP> my $key = shift;
JP> my $value = shift;
JP> for my $item (@$foo) {
JP> if ($item->{$key} eq $value ) {
JP> return 1;
JP> }
JP> }
JP> return 0;
JP> }
that reduces to just:
$item->{'foo'} eq $value ;
there is no reason for a full sub for that. and it has a flaw (as does
the OP's question). which comparison op do you use? hash values can be
numbers too so eq may not work as expected on them.
uri
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