Erwin Krause <> wrote:
> Hello,
>
> I'm new on this list and perl and hope you can help me out with a
> little problem.
>
> I have a little problem with a hash / key reference.
> I have two hashes, where 1 hash stores a configuration and the other
> one stores the description for some keys / values of %h1
>
> my %config = {
> 'ip' => 'value1',
> 'netm' => 'value2',
> 'bcast' => 'value3',
> }
>
> my %configdesc = {
> 'ip' => "this is value1 !",
> 'netm' => "this is value1 !",
> }
# This specifies the order in which config is entered.
my @config_ask_order = qw{ip netm bcast};
>
>
>
> than in my code i ask the user for the values I have a key in %h2.
> sub ask_config {
A "local $| = 1;" might help here. See 'perldoc perlvar' for what it
does.
> foreach (keys %configdesc) {
foreach my $key (@config_ask_order) {
Also, replace $_ by $key in the following. I think it is clearer, and it
makes the explicit assignment "my $key = $_;" redundant.
> if ($config{$_}) {
> printf gettext "Please enter %s", $configdesc{$_};
> print "\n";
Interpolation can replace that printf, and is often simpler, so...
print "Please enter $configdesc{$key}\n"'
> # print default value for array and scalars
> if (ref($config{$_}) eq "ARRAY") {
> printf gettext "(default: %s) : ", join(' ',
@{$config{$_}});
The interpolation of arrays does much the same thing (by default,
anyway). So ...
print "(default: (@{$config{$key}}) : ";
(What is gettext?)
> } else {
> printf gettext "(default: %s) : ", join(' ',
> $config{$_}); }
print "(default ($config{$key}): ";
> my $input = <STDIN>; chomp($input);
>
> # array handling
> if (ref($config{$_}) eq "ARRAY") {
> my $key = $_;
> if ($input ne '') {
> my @tmp = split(/ /, $input);
> $config{$key} = @tmp;
That should be "$config{$key} = [EMAIL PROTECTED];" or "$config{$key} = [EMAIL
PROTECTED];"
> }
> } else {
> $config{$_} = $input if ($input ne '');
> }
> }
> }
> }
>
>
>
> So now my problem is, that i have to ask the user in a specific order.
> (ip before netmask, a.s.o.)
> I thought i simply can change things like that: (i tested both ways,
> 1_ip and 2_netm)
>
> my %config = {
> 'ip' => 'value1',
> 'netm' => 'value2',
> 'bcast' => 'value3',
> '1_ip' => \$config{'ip'},
> '2_netm' => sub { return $config{'ip'} }
> '2_netm' => \&get_hostname,
> }
>
> my %configdesc = {
> '1_ip' => "this is value1 !",
> '2_netm' => "this is value1 !",
> }
>
> with:
> sub get_hostname {
> return ${$config{'hostname'}};
> }
I find it hard to see how that helps with what you are trying to do.
>
>
>
> both require to disable subs or refs in strict what is not the best
> way, i know.
>
> Some1 have an idea to fix this problem or maybe do the whole thing
> some better?
> I dont wanna rewrite my whole code to change the config{ip} to
> config{1_ip}.
For an alternative, investigate Tie::IxHash
(http://search.cpan.org/~gsar/Tie-IxHash-1.21/lib/Tie/IxHash.pm).
HTH
--
Brian Raven
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