Excel VBA to Extract Unique Values from a Range - implementing Dynamic Arrays
I'm having trouble with I'm sure I'm missing something obvious here, but I'm working on a personal project and I'm working on a personal project and I'm trying to extract unique values from a specific range in an Excel sheet using VBA, but I'm running into issues with dynamic arrays starting from Excel 365... My current approach involves using a simple loop to check each value, but it's not efficient, and I suspect there might be a better way with the newer Excel features. Here's the code I've been using: ```vba Sub ExtractUniqueValues() Dim sourceRange As Range Dim uniqueDict As Object Dim cell As Range Dim outputRow As Long Set sourceRange = ThisWorkbook.Sheets("Sheet1").Range("A1:A100") Set uniqueDict = CreateObject("Scripting.Dictionary") outputRow = 1 For Each cell In sourceRange If Not uniqueDict.Exists(cell.Value) Then uniqueDict.Add cell.Value, Nothing ThisWorkbook.Sheets("Sheet2").Cells(outputRow, 1).Value = cell.Value outputRow = outputRow + 1 End If Next cell End Sub ``` The above code runs without any errors, but when I try to execute it on a range that has dynamic array formulas (like `=UNIQUE(A1:A100)`), it fails to capture any changes made to that range. I end up with an empty list on Sheet2. Furthermore, I've noticed that when I manually change values in the source range, the output isn't updating automatically. I've also tried using the `Application.WorksheetFunction.Unique` method, but that doesn't seem to work either. Here’s what I attempted: ```vba Sub ExtractUsingWorksheetFunction() Dim uniqueValues As Variant uniqueValues = Application.WorksheetFunction.Unique(ThisWorkbook.Sheets("Sheet1").Range("A1:A100")) ThisWorkbook.Sheets("Sheet2").Range("A1").Resize(UBound(uniqueValues), 1).Value = uniqueValues End Sub ``` This results in a "Run-time behavior '1004': Application-defined or object-defined behavior" when the source range has dynamic formulas. How can I effectively extract unique values from a range that frequently changes due to dynamic array formulas? Are there any specific configurations or best practices I should be following in Excel 365 to handle such scenarios? This is part of a larger API I'm building. This is part of a larger application I'm building. Is there a better approach? How would you solve this? This is for a microservice running on Debian. Am I missing something obvious?