expanding arrays without data loss

[vbzero]

Word = new GlobalData.Word[WordCount + 1];
				Word[WordCount] = new GlobalData.Word();
				Word[WordCount].Name = sInterop;
				WordCount += 1;

this works fine but there's a little problem left:

Word = new GlobalData.Word[WordCount + 1];

this renews the array size + 1 but also erases all data saved
in the existing array before.

is there any whay to save the existing information?

thx!

[Jop]

Hey vbzero..

I don't know a way to save it automaticly, but maybe put it in a tmp array first and than copy it over to the resized one?

Another idea is to use a ArrayList

[vbzero]

how can I use an array list?

example please

thx!

[hellswraith]

Here is how to upsize an array by one without data loss. You will need a temp array declared to hold the information while you upsize the real array.

// Up the size of the array by one.
ArrayTemp = new String[ArrayMain.Length];
ArrayMain.CopyTo(ArrayTemp,0);
ArrayMain = new String[ArrayTemp.Length + 1];
ArrayTemp.CopyTo(ArrayMain,0);

[DevGrp]

Yes do what Jop said. Use an ArrayList

Here is a short example.

ArrayList aL = new ArrayList();

Word = new GlobalData.Word();
Word.Name = sInterop;

aL.Add(Word);

Look up ArrayList in the help docs.

[hellswraith]

It probably doesn't matter 99% of the time, but they use memory that you aren't using. By that, I mean that when you create an arraylist, it's default size is 16. If you only add in 3 items, you are wasting a little bit of memory space. When you add the 17th item, it will then expand the size to 32. That means you are wasting 16 elements worth of memory. There is also the tiny bit of overhead calling the add method and remove methods. Again, this little bit of overhead in the grand scheme of things is nothing, most of the time, but if you are all about using as little memory as possible, you should stick with regular arrays. I don't know why, but I felt like getting deeper into the subject. I am now off to use an arraylist for my program...lol.