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**DocAElstein** · 01-30-2019, 01:18 AM

Routines called by test code , Sub TestsStringArray() , in last post:

Code:

Sub subSort2DArrayMultiElements( _
            sparray() As String, _
            spOrder As String _
            )
' Sort an array with TWO dimensions.
' Assume Sort on the 2nd Dimension
'  so assumes it IS a 2 Dim array.
' Sort on more than one element.
'
' This uses a merge sort.
' The sort is set up as ascending and not case sensitive.
'
' Use
'    subSortMultiElements Array, Order
'
' Ex Order = "1 4 0 3 2".
' Not all elements need be specified.
' Any delimiter may be used.
'

Dim lnglArrayIndex As Long
Dim lnglElements As Long
Dim lnglEndArray As Long
Dim lnglKey As Long
Dim lnglLbound As Long
Dim lnglM As Long
Dim lnglN As Long
Dim lnglNumSortKeys As Long
Dim lnglO As Long
Dim lnglP As Long
Dim lnglPrevKeyCol As Long
Dim lnglThisKeyCol As Long
Dim lnglUBound As Long
Dim lngSubArrayRows As Long
Dim slKeyVal As String
Dim slOrder As String
Dim slOrderArray() As String
Dim slSubArray() As String
Dim slTopKeyVal As String

lnglElements = UBound(sparray, 2)

' Make an Order Array.
slOrder = spOrder

' Delimiter?
' Disappear the numbers.
For lnglN = 0 To 9
  slOrder = Replace(slOrder, CStr(lnglN), "")
Next lnglN
slOrder = Trim$(slOrder)

' Should only have the delimiter left.
If Len(slOrder) = 0 Then
  slOrderArray = Split(spOrder, " ")
Else
  slOrderArray = Split(spOrder, Mid$(slOrder, 1, 1))
End If

lnglNumSortKeys = UBound(slOrderArray) + 1

' Always Sort on the FIRST Key.
lnglKey = CLng(slOrderArray(0))
subArrayMergeSort sparray, lnglKey

' Only one key?
If lnglNumSortKeys = 1 Then

  Exit Sub

End If

' Now go through the rest of the keys.
' We extract a series of arrays based on the KEY - 1.
' Any records to sort?
If UBound(slOrderArray) > 0 Then
  For lnglN = 1 To lnglNumSortKeys - 1
      
    ' Pick up the start Value from Key-1.
    lnglPrevKeyCol = slOrderArray(lnglN - 1)
    lnglThisKeyCol = slOrderArray(lnglN)
    
    slTopKeyVal = sparray(0, lnglPrevKeyCol)
    
    lnglLbound = 0
    lnglUBound = UBound(sparray, 1)
    
    ' All the same.
    If sparray(lnglUBound, 0) = slTopKeyVal Then
      Exit For
    End If
    
    lnglArrayIndex = 0
    lnglEndArray = UBound(sparray)
    Do
      lnglLbound = lnglArrayIndex
      slTopKeyVal = sparray(lnglArrayIndex, lnglPrevKeyCol)
      Do
        If lnglArrayIndex > lnglEndArray Then
          Exit Do
        End If
      
        slKeyVal = sparray(lnglArrayIndex, lnglPrevKeyCol)
        
        If slKeyVal <> slTopKeyVal Then
          
          lnglUBound = lnglArrayIndex - 1
          Exit Do
          
        End If
      
        lnglArrayIndex = lnglArrayIndex + 1
      
      Loop
      
      ' No need to sort if there's only ONE row.
      lngSubArrayRows = lnglUBound - lnglLbound
      If lngSubArrayRows > 1 Then
      

        ' Get those rows.
        ReDim slSubArray(lnglUBound - lnglLbound, lnglElements)
        lnglP = 0
        For lnglM = lnglLbound To lnglUBound
          For lnglO = 0 To lnglElements
            slSubArray(lnglP, lnglO) = sparray(lnglM, lnglO)
          Next lnglO
          lnglP = lnglP + 1
        Next lnglM
        
        ' Sort 'em.
        subArrayMergeSort slSubArray, lnglThisKeyCol
        
        ' Put 'em back.
        lnglP = 0
        For lnglM = lnglLbound To lnglUBound
          For lnglO = 0 To lnglElements
            sparray(lnglM, lnglO) = slSubArray(lnglP, lnglO)
          Next lnglO
          lnglP = lnglP + 1
        Next lnglM
        
      End If
      
      If lnglArrayIndex > lnglEndArray Then
        Exit Do
      End If
    
    Loop
    
  Next lnglN
End If

' ***********************************************************************
End Sub