arrays newbie

[francois]

Hi,

I have an ArrayList object and I want to transform it into an array like
int[]
I of course do not want to loop myself

Then I thought that I could do the following:

ArrayList list = new ArrayList
.... // here fill the array with integers
int j = 3;
System.Type type = j.GetType();
list.ToArray(type)

My problem is that the ToArray method take a type object in parameter. And I
do not know how to get the type of Int32 without actually having the need to
create an instance?

Can someone tell me how to transform and ArrayList into an [] in the state
of the art way?

Thanks a lot,

francois

 

[Morten Wennevik]

Hi francois,

try

int[] i = (int[])list.ToArray(typeof(Int32));

Happy coding!
Morten Wennevik [C# MVP]

 

[Eric]

Hi,

This is how i copy an ArrayList to Array:

ArrayList al = new ArrayList();
Array ar = new Array(al.Count);
al.CopyTo(ar);

Hope this helps.

 

[Jon Skeet [C# MVP]]

This is how i copy an ArrayList to Array:

ArrayList al = new ArrayList();
Array ar = new Array(al.Count);
al.CopyTo(ar);

Hope this helps.

Why use that when ArrayList has a perfectly good ToArray method?

 

[Eric]

Mmhz never noticed the toArray method Gonna change that immediately.

 

[Dilip Krishnan]

you'd use the typeof operator to get the type generally. Hope that helps

Hi,

I have an ArrayList object and I want to transform it into an array like
int[]
I of course do not want to loop myself

Then I thought that I could do the following:

ArrayList list = new ArrayList
.... // here fill the array with integers
int j = 3;
System.Type type = j.GetType();
list.ToArray(type)

My problem is that the ToArray method take a type object in parameter. And I
do not know how to get the type of Int32 without actually having the need to
create an instance?

Can someone tell me how to transform and ArrayList into an [] in the state
of the art way?

Thanks a lot,

francois