Re: [Vala] request to add another example to Projects/Vala/ListExample

[Gergely Polonkai <gergely polonkai eu>]

Hello,

this is a pretty old topic, but I have the rights to edit wgo pages. If you
think it is actually relevant, I can add this example to the wiki.

Best,
Gergely



Gergely Polonkai
[image: https://]about.me/gergely.polonkai
<https://about.me/gergely.polonkai?promo=email_sig&utm_source=email_sig&utm_medium=email_sig&utm_campaign=external_links>

2016-03-21 15:21 GMT+01:00 Gilzad Hamuni <gilli4 gmx net>:

> Hi,
>
> just want to say that this is some precious info that I needed to learn
> yet.
>
> As a C#-guy I wonder from a "user's" point of view:
> If List<string> implies strdup(), wouldn't it be consistent to
> automatically compare with strcmp() upon removing, too?
>
> Or am I making dangerous assumptions that are not so smart in the end? I
> might be spoiled by too much comfort.
>
> gilzad
>
>
> > Gesendet: Freitag, 18. März 2016 um 22:33 Uhr
> > Von: MohanR
> > HI,
> > I screwed-up that comment. sorry for that. I tried to upload a new
> > version of that page, but wiki says I'm not allowed. Please help to
> > update that page.
> > int main(string[] args) {
> >     List<string> list0 = new List<string>();
> >     List<unowned string> list1 = new List<unowned string>();
> >     list0.append("helloworld"); /* g_strdup() takes place */
> >     list1.append("helloworld"); /* no g_strdup() */
> >     stdout.printf("list0.length=%u, list1.length=%u\n",
> >                   list0.length(), /* length=1 */
> >                   list1.length()); /* length=1 */
> >     list0.remove("helloworld"); /* wont work as expected */
> >     list1.remove("helloworld"); /* works as expected */
> >     stdout.printf("list0.length=%u, list1.length=%u\n",
> >                   list0.length(), /* still length=1 */
> >                   list1.length()); /* length=0 */
> >     list0.delete_link(list0.find_custom("helloworld", strcmp));
> >     stdout.printf("list0.length=%u, list1.length=%u\n",
> >                   list0.length(), /* length=0 */
> >                   list1.length()); /* length=0 */
> >     return 0;
> > }
> > Thanks,
> > Mohan R
> > On Fri, 2016-03-18 at 20:37 +0100, Luca Bruno wrote:
> > > Hi,
> > > thanks a lot for your contribution. The wiki is open, you can
> > > register and edit it freely! :)
> > >
> > > Also pay attention to the comment about "how" and "how". In C, they
> > > are equivalent because those are const strings and have the same
> > > address. But with List<string> they get copied. However with
> > > List<unowned string> they would be equal. It would be better if you
> > > could reword that comment about pointing to the ownership of the List
> > > elements
> > >
> > > On Fri, Mar 18, 2016 at 8:26 PM, MohanR <mohan43u gmail com> wrote:
> > > > Hi,
> > > >
> > > > I'm a beginner in vala. I would like to add the following example
> > > > to
> > > > this wiki link to make other beginners understand important thing
> > > > about
> > > > List<string>.
> > > >
> > > > https://wiki.gnome.org/Projects/Vala/ListSample
> > > >
> > > > int main(string[] args) {
> > > >     List<string> mylist = new List<string>();
> > > >     mylist.append("hi");
> > > >     mylist.append("how");
> > > >     mylist.append("are");
> > > >     mylist.append("you");
> > > >
> > > >     /* prints length: 4 */
> > > >     stdout.printf("length: %u\n", mylist.length());
> > > >
> > > >     /* following wont work as expected because in
> > > >      * C universe, "how" and "how" is not equal
> > > >      */
> > > >     mylist.remove("how");
> > > >
> > > >     /* still prints length: 4 */
> > > >     stdout.printf("length: %u\n", mylist.length());
> > > >
> > > >     /* works because "how" and "how" is equal
> > > >      * according to strcmp()
> > > >      */
> > > >     mylist.remove_link(mylist.find_custom("how", strcmp));
> > > >
> > > >     /* prints length: 3 */
> > > >     stdout.printf("length: %u\n", mylist.length());
> > > >
> > > >     return 0;
> > > > }
> > > > _______________________________________________
> > > > vala-list mailing list
> > > > vala-list gnome org
> > > > https://mail.gnome.org/mailman/listinfo/vala-list
> > >
> > >
> > > --
> > > NixOS Linux
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > https://mail.gnome.org/mailman/listinfo/vala-list
> _______________________________________________
> vala-list mailing list
> vala-list gnome org
> https://mail.gnome.org/mailman/listinfo/vala-list