That's an interesting quirk you've found.

This discussion does present the opportunity to discuss the creation of constants. There's always the constant pragma, but it makes interpolation difficult and syntax confusing. There's your typeglob method, but the fact that *variable = \'value'; creates a sort of immutable constant is itself simply a side effect, easily forgotten unless one brushes up on the POD periodically.

How about the use Readonly; solution?

use strict;
use warnings;
use Readonly;
Readonly my $VAR => 'value';
#......

[download]

It's clear, it states what it does explicitly, and it interpolates properly. Are there negatives to this approach? The ones I can think of are that not everyone will have Readonly.pm installed (but it's easy), and also, unless Readonly::XS.pm is also installed, the new readonly variables will incur a slight performance hit.


Dave

In reply to Re: Ref to a list not being equivalent to a list of refs to each element by davido
in thread Ref to a list not being equivalent to a list of refs to each element by Hue-Bond

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