Help with Array.FindIndex

[xenocatalyst]

Hi,

I would like to use the FindIndex function of Array but I cant seem to get it to work.

My array is a string array, I don't know if this is a problem.

I have tried numerous iterations but have not had any success.

Could someone please help me to get this working, or confirm if this can work with a string array?

Here is my basic non functioning test code:

Dim oTest As String = "D"
Dim oList() As String = {"0", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" } 'NEW STRING START AT 0
Dim xx As Integer = Array.FindIndex(oList, oTest)
messagebox.Show(xx, "xx")

[Andrii_Humeniuk · Accepted solution]

Hi @xenocatalyst . If you convert your array to a list you will get a FindIndex method. Example:

Dim oTest As String = "D"
Dim oList() As String = {"0", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" } 'NEW STRING START AT 0
Dim xx As Integer = oList.ToList().FindIndex(Function(n) n = oTest)
MessageBox.Show(xx, "xx")

[g.georgiades · Accepted solution]

Although you still have to convert the Array to a List, you can .IndexOf without requireing a lambda.

Dim xx As Integer = oList.ToList().IndexOf(oTest)

[xenocatalyst]

Hi Andrii_Humeniuk

This is the exact answer I was look for, thankyou for clarifying where it should be used.

Hi g.georgiades

thankyou for showing me a simpler way to achieve the same result.

Both of these work well.

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