Array Length Variables

• These are variables whose only purpose is to track the length of an array

• But the array already tracks its own length

• This can almost always be replaced:

        my $num_items = scalar @array;
        $array[$num_items] = $new_item;

• Its purpose is to add an element to the end of @array

• Perl already has a special built-in function for doing that:

        push @array, $new_item;

• Savings: one line of code, one variable

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Copyright © 2006 M. J. Dominus