[clug] perl question
Francis James Whittle
fudje at phreaker.net
Mon Oct 18 02:23:10 GMT 2004
Not that this is really the best solution, but you could use explicit
package namespaces to get around that. Either just use main, like
instead of 'my $scalar; my @list;' you could use '$main::scalar;
@main::list;', or have a configuration package, say 'MyConfig', which
would be like:
Another possibility is to have your configuration fragment return a
(possibly bless()'d, but it's really pointless) hash reference. If
memory serves, this is done something like:
# package MyConfig;
my $self = (
foo => 'bar',
bar => 'baz',
# bless ($self, MyConfig);
If you *are* going to bless() it, that'll obviously work better with an
actual constructor. In the long run, a properly constructed
configuration object will look clearer than a reference returned from a
file in a big ol' do statement (and will result in less superfluous
colons), and it still doesn't *need* to be bless()'d. There are other
benefits too, like different constructors for different conditions, etc.
Can't help you with the debug command, maybe perldoc can ;)
On Mon, 2004-10-18 at 10:17 +1000, Kim Holburn wrote:
> Hi Guys,
> I was wondering if one of you perl guys out there could throw some
> light on this question.
> I have a perl script with a config file. Recently it seemed to me that
> it would be better to make the config file a perl fragment, (it just
> does some variable assignments) and use a "do" statement to read it in.
> Unfortunately it messes with my declarations. If I declare the
> variables anywhere in a "my" declaration the assignments don't work.
> If I don't declare anything it all works OK. I like to work under
> "strict" but this doesn't any work more. Something about packages? I
> never really understood about packages. Do I have to declare these
> local or something else?
> Is there a debug command to show all variables and what type they are?
> Kim Holburn
> IT Manager, Canberra Research Laboratory
> National Information and Communication Technology Australia
> Ph: +61 2 61258620 M: +61 417820641
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