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  1. or download this
    sub remove_cruft
{
...
my @no_cruft = remove_cruft(@lines);
# or:
my @no_cruft = remove_cruft(<FH>);
  2. or download this
    # Using prototypes (which are considered "evil" by some)
sub remove_cruft(@)
...
remove_cruft(@lines)
# this still doesn't work:
# remove_cruft(<FH>)
  3. or download this
    sub remove_cruft
{
...
  # do stuff to @lines;
  @lines;
}