Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

Re: Modules: computing a constant, "on load" or in new()?

by AnomalousMonk (Chancellor)
on Aug 20, 2013 at 22:28 UTC ( #1050259=note: print w/replies, xml ) Need Help??

in reply to Modules: computing a constant, "on load" or in new()?

What BrowserUk said.
I would look at it slightly differently. If we are talking about a 'class' constant, i.e., something that is invariant over all class and object methods and all 'free' functions of the class, make it a constant as soon as possible, computed or otherwise. If it's an 'object' constant, i.e., something invariant only over the lifetime of a given object, then, of course, it must be somehow created or defined in the constructor: how else? As an example of the first possibility:

package Foo::Bar; ... use constant RX => qr{ hello }xms; ... sub new { ... } ... sub method { my $self = shift; ... if ($self->{bar} =~ RX) { ... } ... } ... 1;

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1050259]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (3)
As of 2018-01-21 21:45 GMT
Find Nodes?
    Voting Booth?
    How did you see in the new year?

    Results (230 votes). Check out past polls.