Hi

Is there an efficient way in O'Caml to append an element to an array ref?

let append_elt r x = r := Array.append !r [| x |];;

copies the contents of the whole array in its body, while e.g. C++ vector 
push_back in most cases won't (memory is reserved in chunks automatically, or 
it can be reserved manually)

IOW it seems strange to me that functions of arrays can change their contents 
but not their size, while functions of array ref's can do it, but 
inefficiently. How about 

Array.resize :  'a array -> int -> unit

or at least 

Array.resize: 'a array ref -> int -> unit ?

Thanks
Oleg
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