asked on

Compare arrays of different sizes

I'm sure there is something very wrong with my thinking but I can't see it.

I'm trying to compare 2 arraylists of different sizes with:

If array1.Count > array2.Count Then
For i As Integer = 0 To array1.Count - 1
For x As Integer = 0 To array2.Count - 1
If array2.Item(x).ToString = array1.Item(i).ToString Then
array1.RemoveAt(i)
array1.RemoveAt(i)
End If
Next
Next
End if

It actually works well but I get errors:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index at System.Collections.ArrayList.get_Item(Int32 index) ...

Where is my problem?

Bob Learned

This is a typical problem with VB.NET. The ending condition for the VB.NET is not re-evaluated after each iteration, it is only evaluated once, at the beginning of the For loop.

ASKER CERTIFIED SOLUTION

Arthur_Wood

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daJman

ASKER

Nice, it works. Thanks Arthur. I figured it was something simple.

TLO - I have been meaning to read that C# book eventually...

Thanks guys.

Arthur_Wood

Glad to be of assistance.

AW