changing in two arrays

[simendsjo]

On 26.06.2011 13:59, %u wrote:
> hi
> I create two arrays and I want the change in one of them effects the other one.
>
> i try
>
> int[] array1 = [1, 2, 3, 4, 5];
> int[] array2;
> array2 = array1; // without .dup
>
> assert(array1 == array2);
> assert(array1 is array2); // here i am confused because 'is' mean thay have
> the same address or what?
>
> array2 ~= 6;
> assert(array1 == [1, 2, 3, 4, 5]); // here is the problem
> assert(array2 == [1, 2, 3, 4, 5, 6]);
>

The runtime will duplicate array2 to avoid array stomping. Steven 
Schveighoffer wrote a nice article on arrays you should read: 
http://www.dsource.org/projects/dcollections/wiki/ArrayArticle