vba, copy data from sparse column to form a new dense column - excel

Question

An over-simplified description of my problem is illustrated in the figures below. I want to transform sparse data from a column in the Page1 worksheet to dense and then load it in a dense range in the Page2 worksheet.
My solution so far is that in the following code snippet. I would like to know if there is a more efficient alternative to achieve this goal, namely without a for loop or at least without the j variable.
Sub CopyFromMultipleRanges()
With Worksheets("Page1")
.Range("A1:A5").Value = 1
.Range("A8:A10").Value = 2
Dim c_cell As Range
Dim j As Long
j = 1
For Each c_cell In .Range("A1:A5,A8:A10")
Worksheets("Page2").Range("A" & j).Value = c_cell.Value
j = j + 1
Next
End With
Worksheets("Page2").Activate
End Sub
Initial column where data is sparse.
Final dense data column.

Answer 1

You can do this if you want to remove the blanks on the same sheet. If not just copy the data to a new sheet and then run this on that range
Sub Delete_Blank_Rows()
On Error Resume Next
Range("A1:A10").Select
Selection.SpecialCells(xlCellTypeBlanks).EntireRow.Delete
End Sub

Answer 2

Here's how I would do it:
'create a collection to store the data
Dim bin As New Collection
Dim ws1 As Worksheet
Dim ws2 As Worksheet
Dim size As Long
Dim i As Long
Dim v As Variant
'set worksheet references
Set ws1 = Excel.Application.ThisWorkbook.Worksheets("Page1")
Set ws2 = Excel.Application.ThisWorkbook.Worksheets("Page2")
With ws1
size = .UsedRange.Rows.Count
'loop through the range to pick up the data from non-empty cells
For i = 1 To size
'if the cell is not empty, then add the value to the collection
If Not IsEmpty(.Cells(i, 1).Value) Then
bin.Add .Cells(i, 1).Value
End If
Next
'loop through the bin contents
i = 1
For Each v In bin
ws2.Cells(i, 1).Value = v
i = i + 1
Next
End With
Hope it helps!
Update:
I tested this code and it works:
Sub test()
Dim ws1 As Worksheet
Dim ws2 As Worksheet
Set ws1 = Excel.Application.ThisWorkbook.Worksheets(1)
Set ws2 = Excel.Application.ThisWorkbook.Worksheets(2)
ws1.Range("A:A").SpecialCells(xlCellTypeConstants).Copy ws2.Range("A:A")
End Sub
you can read more about Range.SpecialCells here. learn something new everyday!

Answer 3

This assumes that you are considering the all rows with the lower and upper row limits of the ranges given ie. that "A1:A5" and "A8:A10" is indeed "A1:A10".
Option Explicit
Public Sub CopyFromMultipleRanges()
Dim rng As Range: Set rng = ThisWorkbook.Worksheets("Page1").Range("A1:A10")
Application.ScreenUpdating = False
If Application.WorksheetFunction.CountBlank(rng) = rng.Count Then Exit Sub
With rng
.AutoFilter
.AutoFilter 1, "<>"
.SpecialCells(xlCellTypeVisible).Copy Worksheets("Page2").Range("A1")
.AutoFilter
Application.ScreenUpdating = True
End With
End Sub