CODEWITHSUNDEEP
vb.net
MCHagen4
MCHagen4

Reputation: 59

List(of String()) contains String()

I am trying to find out if an array of Strings exists in a list of arrays of Strings, but am running into some confusion. Here is some code:

Dim listResults as List(of String)
Dim listStringArrays as List(of String())
Dim Something as String() = {"Foo", "Bar", "Stuff"}
Dim Otherthing as string() = {"Foo", "Bar", "Stuff"}

listStringArrays.Add(Something)

IF listStringArrays.Contains(Otherthing) then
listResults.Add("True")
Else
listResults.Add("False")
End If

IF listStringArrays(0).Equals(Otherthing) then
listResults.Add("True")
Else
listResults.Add("False")
End If

listResults would then contain two "False". But strangely:

Something(0) = Otherthing(0)
Something(1) = Otherthing(1)
Something(2) = Otherthing(2)

These would all evaluate to true. How can I find out if my listStringArrays contains Otherthing if Contains does not work?

Bonus question: Why would Contains not work in this instance?

Upvotes: 1

Views: 3077

Answers (1)

Blorgbeard
Blorgbeard

Reputation: 103467

Two arrays with the same contents are still not the same array. Something = Otherthing is false. That's why Contains doesn't work.

You could instead use SequenceEqual to see whether any of the arrays in listStringArrays have the same contents as Otherthing.

If listStringArrays.Any(Function(t) t.SequenceEqual(Otherthing)) Then

Upvotes: 3

Related Questions