On 06/08/2012 07:50 AM, Paul wrote: > string[ulong] is a standard array > ulong[string] would be associative....NO? No, they are both associative arrays. string[ulong] is a mapping from ulong to string, ulong[string] is a mapping from string to ulong. Ali -- D Programming Language Tutorial: http://ddili.org/ders/d.en/index.html