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adding blank elements to array

Answer 1

+2 A:

Yes you need to loop and add new objects into newly added indexes.

dr. evil 2010-02-23 12:39:45

Answer 2

A:

Try not using an array but a List instead. They're much easier to use and give more control.

Dim myList As List(Of Whatever)  
myList.Add(New Whatever)

MarkJ 2010-02-23 12:52:09

Agree, however using existing OBI where an array is passed to me and adding to a Table.Rows colection, so can't change the methodology. Also your answer do give how to add 47 instance without doing the do loop

spacemonkeys 2010-02-23 13:05:48

Cheers though :-)

spacemonkeys 2010-02-23 14:02:19

Answer 3

A:

Are you looking for this....

ReDim PRESERVE thatArray(to_the_new_size)

The preserve should, uhm, preserve the original values in their original places.

tobrien 2010-02-23 14:07:08

Wrong end, the issue is that the new items added (object array) when you go from 10 items to 15, items 10-15 have not been initialized with the NEW statementAlso the VB.Net way to so the above (which is what I am using) is array.resize(Array,new size) which doesn't destroy the contents of the array up to the new size

spacemonkeys 2010-02-23 14:30:34

Answer 4

A:

I am (then) not sure what your looking to accomplish... using ReDim Preserve (older) or the .reSize (newer) will certainly add to the "end" of the array and those elements MUST BE null since you cannot pass new elements into the constructor.

But is that what your looking for ? A way to pass the new values into the constructor of the new elements so it returns with the old-er values as will as the new ones?

Even if you overload the constructor, you'll have to LOOP the new values in. (As far as I can see.)

tobrien 2010-02-24 13:20:41

Hi Tobrien, yes that was the question. The only reason that I asked the question was out of interest, I used table.rows.addrange(array.convertall(array,delegate function that converted all element to table rows))) which converted the array to table rows .. then I had to itterate to the max count adding rows, which after the first statement, seemed a bit long winded, so I asked the question out of interest, as I said in the question I'd achieved what I wanted, just looking for alternate ways to do it

spacemonkeys 2010-02-24 21:21:23

In the bad old days, what you would have ended up doing was grabbing (i.e. overloading) the constructor and then using a Windows USER.dll call to move memory or some such (i.e. at the assembly code level) to populate the new entries quickly. As much as most of love/hated the DECLARE features, they DID provide speed when needed.tob

tobrien 2010-02-25 14:26:21

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adding blank elements to array

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