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[DocAElstein]

Full demo code to accompany last post:

Option Explicit
Sub ThisShouldWork()
Dim LastRow As Long, strEval As String
 Let LastRow = Cells(Rows.Count, "A").End(xlUp).Row
 Let strEval = Replace(Replace("IF(ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A2:A#,"" "",""""),"","","""")),IF(LEFT(A1:A@,4)=""2018"",TRIM(A1:A@&"" ""&A2:A#),""""),IF(LEFT(A1:A@,4)=""2018"",A1:A@,""""))", "#", LastRow + 1), "@", LastRow)
 Debug.Print strEval ' Hit Ctrl+g from the VB Editor to get the Immediate window up.                                                                                              'IF(ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A2:A41," ",""),",","")),IF(LEFT(A1:A40,4)="2018",TRIM(A1:A40&" "&A2:A41),""),IF(LEFT(A1:A40,4)="2018",A1:A40,""))
'This is the spreadsheet equivalent to Rick's Evaluate
 Range("B1:B" & LastRow).FormulaArray = "=" & strEval
'This gives a demo of the actual formulas that Excel VBA does
 Range("J5:J44").Value = "=IF(ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A2,"" "",""""),"","","""")),IF(LEFT(A1,4)=""2018"",TRIM(A1&"" ""&A2),""""),IF(LEFT(A1,4)=""2018"",A1,""""))" ' Applying the fixed vector notation (Excel instructed to do that by no $s) will result in the same relative formula. Displayed will be the actual formula ( in the relative form, but that is not important)
  
' Final solution  Rick : http://www.excelfox.com/forum/showth...0888#post10888
  Range("A1:A" & LastRow) = Evaluate(Replace(Replace("IF(ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A2:A#,"" "",""""),"","","""")),IF(LEFT(A1:A@,4)=""2018"",TRIM(A1:A@&"" ""&A2:A#),""""),IF(LEFT(A1:A@,4)=""2018"",A1:A@,""""))", "#", LastRow + 1), "@", LastRow))
'  Range("A1:A" & LastRow).SpecialCells(xlBlanks).EntireRow.Delete ' This will mess up now due to my .FormulaArray  as you can't delete bits of that
End Sub



'          2018, 1, 90709, 10020009, P4, Blabla og Blalala (NY), CHE, Blabla,Bla-ah, 10006098, 15392.64
'                        TRIM(A13" "&A14)

'   IF(      True        ,   TRIM(A13" "&A14)        ,       A13       )


'   IF(       ISNUMBER(0+1000609815392.64),   TRIM(A13" "&A14)        ,       A13       )
'   IF(       ISNUMBER(0+SUBSTITUTE(10006098,15392.64),",","")),   TRIM(A13" "&A14)        ,       A13       )

'   IF(       ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A14," ",""),",","")),   TRIM(A13" "&A14)        ,       A13       )           )
'   IF(       ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A14," ",""),",","")), IF(LEFT(A13,4)="2018"  ,  TRIM(A13" "&A14)  ,  "")      ,     IF( LEFT(A13,4)="2018"  ,  A13  ,"" )     )


'   IF(       ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A14," ",""),",","")), IF(LEFT(A13,4)="2018"  ,  TRIM(A13" "&A14)  ,  "")      ,     IF( LEFT(A13,4)="2018"  ,  A13  ,"" )     )
'      IF(       ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A14," ",""),",","")),IF(LEFT(A13,4)="2018",TRIM(A13" "&A14),"")      ,     IF(LEFT(A13,4)="2018",A13,"")     )
'            IF(ISNUMBER(0+SUBSTITUTE(SUBSTITUTE(A14," ",""),",","")),IF(LEFT(A13,4)="2018",TRIM(A13" "&A14),""),IF(LEFT(A13,4)="2018",A13,""))