Remove duplicates from array using VBA

Question

Assume I have a block of data in Excel 2010, 100 rows by 3 columns.

Column C contains some duplicates, say it starts off as

1, 1, 1, 2, 3, 4,

Answer 1

I answered a similar question. Here is the code I used:

Dim dict As Object
Dim rowCount As Long
Dim strVal As String

Set dict = CreateObject("Scripting.Dictionary")

rowCount = Sheet1.Range("A1").CurrentRegion.Rows.Count

'you can change the loop condition to iterate through the array rows instead
Do While rowCount > 1
  strVal = Sheet1.Cells(rowCount, 1).Value2

  If dict.exists(strVal) Then
    Sheet1.Rows(rowCount).EntireRow.Delete
  Else
    'if doing this with an array, then add code in the Else block
    ' to assign values from this row to the array of unique values
    dict.Add strVal, 0
  End If

  rowCount = rowCount - 1
Loop

Set dict = Nothing

If you want to use an array, then loop through the elements with the same conditional (if/else) statements. If the item doesn't exist in the dictionary, then you can add it to the dictionary and add the row values to another array.

Honestly, I think the most efficient way is to adapt code you'd get from the macro recorder. You can perform the above function in one line:

    Sheet1.UsedRange.RemoveDuplicates Columns:=3, Header:=xlYes