Array subset copying

25 Mar 2005 2:41 PM

Derrick

If I have an array..

object[] myObjs = someMethod.SearchForObjs();

and the length of that array is 100, but I want to extract the last 80
objects into another array, what's the cleanest way to do that?
Array.CopyTo seems to allow specification of target index to start copying
into, but not the source array index. Do I need to brute force it and go
with a for loop?

Thanks in advance!

Derrick

25 Mar 2005 3:55 PM

Kurt

Derrick the Array.Copy function should work for you.

[C#]
public static void Copy(Array sourceArray, int sourceIndex, Array
destinationArray,
int destinationIndex, int length);

Show quote

"Derrick" wrote:

> If I have an array..
>
> object[] myObjs = someMethod.SearchForObjs();
>
> and the length of that array is 100, but I want to extract the last 80
> objects into another array, what's the cleanest way to do that?
> Array.CopyTo seems to allow specification of target index to start copying
> into, but not the source array index. Do I need to brute force it and go
> with a for loop?
>
> Thanks in advance!
>
> Derrick
>
>
>

26 Mar 2005 3:19 AM

Peter Bromberg [C# MVP]

Take a look at the System.Buffer.BlockCopy method.
Peter

Show quote

"Derrick" <derrick1***@excite.com> wrote in message
news:uvOA2iUMFHA.2252@TK2MSFTNGP15.phx.gbl...
> If I have an array..
>
> object[] myObjs = someMethod.SearchForObjs();
>
> and the length of that array is 100, but I want to extract the last 80
> objects into another array, what's the cleanest way to do that?
> Array.CopyTo seems to allow specification of target index to start copying
> into, but not the source array index. Do I need to brute force it and go
> with a for loop?
>
> Thanks in advance!
>
> Derrick
>
>