data type that preserve order

[Andrea Zagli <azagli libero it>]

is there a data type, similar to array, that preserve the order on  
which elements are inserted?

for example ghashtable and gptrarray doesn't preserve the order, so  
when they are traversed (for example with a "for" cicle, regarding  
gptrarray) the order may be not the same when elements are inserted

garray or g[s]list?


thanks in advance