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  1. or download this
    sub foo
    {
    ...
        }
        return $foo_return;
    }
    
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    sub foo
    {
    ...
        $bar_return = munge_munge( $bar_arg );
        return $bar_return;
    }
    
  3. or download this
    my $sub_ref = sub { munge_munge( shift ) };
    
  4. or download this
    open BINFILE, "<", "somefile.txt" or die $!;
    ReadBytes( $num, \*BINFILE );
    ...
        }
        return @bytes;
    }