You Can use defined() perl function
----------
From: John W. Krahn [SMTP:[EMAIL PROTECTED]]
Sent: Tuesday, November 27, 2001 3:37 PM
To: [EMAIL PROTECTED]
Subject: Re: Checking to see if $user exists in a hash.
Daniel Falkenberg wrote:
>
> I have just created the hash that looks like this....
>
> %users = (
> 'uucp' => '14',
> 'daemon' => '2',
> 'daniel' => '45',
> 'test2' => '45',
> 'halt' => '0',
> 'test4' => '45'
> );
>
> $user = "test4";
>
> Now here I want to see if $user exists in the hash... if it doesnt
then
> I want it to return an error. What would be the best way of going
about
> this?
if ( exists $users{ $user } ) {
# the %users hash has the key $user
...
}
perldoc -f exists
John
--
use Perl;
program
fulfillment
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