On 18 February 2011 11:51, Johan Tibell <johan.tibell at gmail.com> wrote: > > Option 1: > Data.HashMap (strict) > Data.HashMap.Lazy This would probably work the best, especially as it's the behaviour already taken by ByteString, Text, etc. -- Ivan Lazar Miljenovic Ivan.Miljenovic at gmail.com IvanMiljenovic.wordpress.com