How to Intersect two Arrays?

Question

I'm working with VB.Net, and have two one-dimensional Arrays. Is there an Inbuilt function for finding the elements that are common to both of them? Or do I have to write one for myself?

Answer 1

I'm afraid you'll have to write one for yourself, because there is no built-in function in .NET 2.0.

Look at this StackOverflow question for ideas about how you could implement it yourself.

Answer 2

If you can use the LINQ extension methods (VB9), then yes - you can use Enumerable.Intersect():

dim a as String() = {"blah", "bleak", "blorg", "blue"}
dim b as String() = {"blaah", "bleak", "bleee", "blue"}

' c will contain "blah" and "blue" '
dim c as IEnumerable(Of String) = a.Intersect(b)

Answer 3

Just use LinqBridge for .net 2.0 http://code.google.com/p/linqbridge/downloads/list and you should be able to use the intersect method.