Delete Element from array

[Mike]

Hi,

I created such procedure for deleting element from my dynamic array
because I could not find such possibility from .Net .


Private aintABC() As Int32

'' Initialization somewhere in another procedure

Private Sub DeleteFromArray(ByVal intIndex As Integer)
Dim i As Integer
For i = intIndex + 1 To aintABC.Length - 1
aintABC(i - 1) = aintABC(i)
Next
ReDim Preserve aintABC(aintABC.Length - 2)
End Sub


Maybe somebody know how I can do it without iteration or .Net does not
have any standart decision.

Thanks

 

[Bismark Prods]

You could do it with CopyTo method.

Bismark

 

[Herfried K. Wagner [MVP]]

* (e-mail address removed) (Mike) scripsit:

I created such procedure for deleting element from my dynamic array
because I could not find such possibility from .Net .

Use an 'ArrayList' instead.

 

[Bismark Prods]

You don't know the use of the table ... So you can't give this advice !!!

 

[Herfried K. Wagner [MVP]]

You don't know the use of the table ... So you can't give this advice !!!

?!?

 

[Jay B. Harlow [MVP - Outlook]]

Mike,
As the others have suggested.

If boxing of value types is a concern, for an array of Integer (and other
value types) I would consider using Array.Copy to copy the elements before &
after the element that I was deleting.

Something like:
Private Shared Sub DeleteFromArray(ByRef aintABC() As Integer, ByVal
intIndex As Integer)
Dim result(aintABC.Length - 2) As Integer
Array.Copy(aintABC, 0, result, 0, intIndex)
Array.Copy(aintABC, intIndex + 1, result, intIndex,
aintABC.Length - intIndex - 1)
aintABC = result
End Sub

For an array of reference types or if boxing is not an issue. I would use an
ArrayList or a class derived from CollectionBase. More then likely I would
use an ArrayList, until performance was proven to be an issue via profiling.


When Whidbey (VS.NET 2005) ships we will have a generic ArrayList like class
where we will be able to delete from the middle of a collection of Integers,
without the expense of boxing the elements...

Hope this helps
Jay

 

[Bismark Prods]

I would gently remarks that : This is not ever possible to use an ArrayList
at the place of a Table. It depends the use of.

Bismark

 

[Herfried K. Wagner [MVP]]

I would gently remarks that : This is not ever possible to use an ArrayList
at the place of a Table. It depends the use of.

I agree, but if the OP is talking about a dynamic array, an arraylist is
more likely the better solution.