> On Oct 31, 2015, at 4:10 PM, Andrea Zagli <aza...@libero.it> wrote:
>
> Il giorno ven 30 ott 2015 19:09:47 CET, Emmanuele Bassi ha scritto:
>> Hi;
>>
>>> On 30 October 2015 at 16:43, Andrea Zagli <aza...@libero.it> wrote:
>>> is there a data type, similar to array, that preserve the order on which
>>> elements are inserted?
>>
>> All the array and list types preserve the order of insertion. For
>> obvious reasons, GHashTable doesn't.
>>
>>> 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
>>
>> GPtrArray preserves the order of insertion — it's an array, after all.
>> Why do you think it does not?
>
> it is written on the help
>
> https://developer.gnome.org/glib/stable/glib-Pointer-Arrays.html
>
> "If you remove elements from the array, elements at the end of the array are
> moved into the space previously occupied by the removed element. This means
> that you should not rely on the index of particular elements remaining the
> same."
>
Elements plural here.
The order of elements in a pointer array are preserved and do not change, the
above comment only points out that arrays do not become "sparse" when removing
elements. A given index cannot be expected to be valid after removing elements.
Cheers,
-Tristan
>
> may be also other data type makes the same thing? i didn't find reference
> about that
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