问题
How can I subtract a comma seperated string from another one in Excel?
- If A1:
1,2,3,4,5,6,7,8,9 - And A2:
2,6,9 - My desired result should be in cell A3, after subtraction (A1-A2):
1,3,4,5,7,8
It was very easy when A2=2,3,4 (serially) via SUBSTITUTE function, however I can't find a solution to the above.
回答1:
You have both tagged formula and VBA. So let me give you two options too:
1) Formula
=TEXTJOIN(",",1,FILTERXML("<t><s>"&SUBSTITUTE(A1&","&A2,",","</s><s>")&"</s></t>","//s[not(following::*=. or preceding::*=.)]"))
Note1: This is an array formula and needs to be confirmed through CtrlShiftEnter
Note2: This requires access to the TEXTJOIN function, available in office 365 and Excel 2019.
Note3: More usefull FILTERXML "tricks" can be found here
2) UDF
I'd recommend using Split and Join functions to do this:
Function TxtFilter(val1 As String, val2 As String, sep As String) As String
Dim arr1 As Variant, arr2 As Variant
Dim x As Long
Dim dict As Object: Set dict = CreateObject("Scripting.Dictionary")
arr1 = Split(val1, sep)
arr2 = Split(val2, sep)
'Iterate first array to load dictionary
For x = LBound(arr1) To UBound(arr1)
dict(arr1(x)) = 1
Next x
'Iterate second array to remove from dictionary
For x = LBound(arr2) To UBound(arr2)
If dict.Exists(arr2(x)) Then dict.Remove arr2(x)
Next x
'Join remainder back together
TxtFilter = Join(dict.keys, sep)
End Function
Call in any cell through =TxtFilter(A1,A2,",")
来源：https://stackoverflow.com/questions/60575515/subtracting-a-comma-separated-string-from-another-one-in-excel