Collection.toArray(IntFunction)

[Remi Forax]

On 06/13/2013 07:33 AM, Zhong Yu wrote:
> On Thu, May 30, 2013 at 3:14 AM, Stephen Colebourne
> <scolebourne at joda.org> wrote:
>> On 30 May 2013 08:30, Peter Levart <peter.levart at gmail.com> wrote:
>>> String[] y = x.toArray(String[]::new);
>> Thats very nice ;-)
>> Stephen
>>
> Hmm...
>      toArray(new String[0])
>      toArray(String[]::new)
> not too much difference in syntax. Try to explain it to a newbie:)

Apart from the coloncolon syntax (::), it's easy either you give the 
size or not.

>
> I wish we could have something like this:
>
>     interface Collection<E>
>     {
>          @SafeVarargs
>          E[] array(E... array);
>     }
>
>      Collection<String> x = ...;
>      x.array();
>
> This works because an empty String[] is passed in as the arg.

Without discussing about the restrictions on @SafeVarargs,  It depends 
what you mean by it works, if it's apart creating a big hole in the type 
safety of all programs because this method allows to create arrays of 
parametrized types which are unsafe, I agree with you, it works :)

>
> Zhong Yu
>

Rémi