#!/usr/bin/perl -w
use strict;

my @bigarray = ("insert", "a very", "long list here");#point A

my $thing1 = mySub();
my $thing2 = mySub();
#...etc - using mySub repeatedly

sub mySub {
   #point B - should I declare my @bigarray here instead, and why?
   for (@bigarray){
     #do stuff with array
   }
}