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Re: Key-Board Interactive Perl Application

by GrandFather (Sage)
on Dec 12, 2012 at 05:44 UTC ( #1008453=note: print w/ replies, xml ) Need Help??


in reply to Key-Board Interactive Perl Application

For that sort of application I use light weight OO. Consider:

use strict; use warnings; my $obj = bless {indent => '...'}; for my $suffix (qw(hello world)) { my $func = $obj->can("print_$suffix"); next if ! $func; $func->($obj, " (suffix was $suffix)"); } sub print_hello { my ($self, $suffix) = @_; print "$self->{indent}hello$suffix\n"; } sub print_world { my ($self, $suffix) = @_; print "$self->{indent}world$suffix\n"; }

Prints:

...hello (suffix was hello) ...world (suffix was world)

There are a few subtle things going on there. If you've not used OO before notice that the object ($obj) carries along a hash reference so you can provide common information (see how 'indent' is used).

The reason the sub names have a 'print_' prefix is so that user provided names can't be used to call unintended subs.

True laziness is hard work


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