% perl -de0

Loading DB routines from perl5db.pl version 1.37
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main::(-e:1):   0
  DB<1> use Foo qw(get_array populate_array)

  DB<2> x get_array()
0  ARRAY(0x7fa9ac81a298)
     empty array
  DB<3> populate_array()

  DB<4> x get_array()
0  ARRAY(0x7fa9ac81a298)
   0  'a'
   1  'b'
   2  'c'
   3  'd'
   4  'e'
   5  'f'
   6  'g'
   7  'h'
  DB<5>