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type 'a t =
{ default_value : 'a ;
mutable realsize : int ;
mutable tab : 'a array }
let create n v =
{ default_value = v ;
realsize = 0 ;
tab = Array.make n v }
let copy t =
{ default_value = t.default_value ;
realsize = t.realsize ;
tab = Array.copy t.tab }
let get t index =
if index < 0 then failwith "extArray.get, negative index."
else if index >= t.realsize then t.default_value
else t.tab.(index)
let set t index v =
let len = Array.length t.tab in
if index >= len then
begin
let newarray = Array.make (max (index+1) (2 * len)) t.default_value in
Array.blit t.tab 0 newarray 0 len ;
t.tab <- newarray ;
end ;
t.tab.(index) <- v ;
t.realsize <- max t.realsize (index+1) ;
()
let size t = t.realsize
let fold t acu f =
let akk = ref acu in
for i = 0 to t.realsize - 1 do
akk := f i t.tab.(i) !akk ;
done ;
!akk
let iter t f =
for i = 0 to t.realsize - 1 do
f i t.tab.(i) ;
done