Perl reset variable

Question

I'm learning Perl, and I made a script that will use defined variables in the beginning of my script to establish connection,pull records, modify them, then close connection.

the second part of my work involve repeating the same steps but for different server.

is there is a way to un-set whatever variables has been set before? and then use new defined settings and repeat the steps?

Thank you

You should consider the type of variable that you refers, is it an array? or a hash? or a scalar?. Generally I reset this with @array = (); or %hash = (); — Cristian Velandia
– Cristian Velandia, Commented Feb 26, 2013 at 22:25
It sounds like what you want is a subroutine (a.k.a. function) with parameters. — pamphlet
– pamphlet, Commented Feb 26, 2013 at 22:27
I usually just declare types at the beginning and assign as I go. Just reassign them but a function with parameters would be better. — Benjamin Trent
– Benjamin Trent, Commented Feb 26, 2013 at 22:29
Reusing variables is horrible practice. Then you have to scan backwards in the code to see where they have been changed. Declare variables with a limited scope, and don't repeat your code: make a subroutine instead. — TLP
– TLP, Commented Feb 26, 2013 at 23:13

Tim De Lange · Accepted Answer · 2013-02-26 22:51:31Z

7

Define your variables in their own scope.

{
    my $server = '123.123.123.123';
    my $username = 'user1';
    ping($server);
    login($username);
}
{
    my $server = '222.222.123.123';
    my $username = 'user2';
    ping($server);
    login($username);
}

Even better, use a function definition:

sub doSomethingToServer
{
    my ($server, $username) = @_;
    ping($server);
    login($username);
}

doSomethingToServer('123.123.123.123', 'user1');
doSomethingToServer('222.222.123.123', 'user2');

answered Feb 26, 2013 at 22:51

Tim De Lange

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