For further consideration...

[Marek Kozieł]

2009/3/25 Tim Keith <tim.keith at gmail.com>:
> I would like to suggest at least leaving out ?[]
>
> The example in the proposal is not very compelling:
>    class Group {
>        Person[] members; // null if no members
>    }
>    class Person {
>        String name; // may be null
>    }
>    final String aMember = g?.members?[0]?.name ?: "nobody";
>
> If members is null you get "nobody" but if members is empty (the logical way
> to signify "no members") you get ArrayIndexOutOfBoundsException.
>
> "array?[...]" is like saying: if array is null treat it like it's an
> infinitely
> long array of nulls.
>
> "object?.member" is like saying: if object it null, treat it like every
> field
> is null and every method returns null.
> The array analog to that should be that "array?.length" means
>    array == null ? 0 : array.length
>
> -- Tim
>
>

ArrayIndexOutOfBoundsException is valid because on ArrayList would
work it in the same way.

-- 
Pozdrowionka. / Regards.
Lasu aka Marek Kozieł

http://lasu2string.blogspot.com/