In particular, consider the statement
    my $alphabet = qw( A T G C );
and maybe do a little experiment to print  $alphabet and see just what it is.

Update: The next statement
    my @bases = @$alphabet;
suggests  $alphabet is supposed to be an array reference that is de-referenced to initialize the  @bases array, but since  $alphabet is used nowhere else, why not just initialize  @bases directly from the  qw(A T G C) list of bases?

In reply to Re^3: How do foreach loops use their list values? by AnomalousMonk
in thread [Solved]How do foreach loops use their list values? by enderk

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