连接字符串并删除多余的逗号

Question

我正在尝试连接多个字符串并以逗号分隔它们， 然后删除多余的，前导和尾随的逗号。

例如，输入TEST("", "b", "c", "", "")，我想得到 b, c

但是，我的正则表达式,$| ,+|^,并没有真正考虑重复的逗号：

Function TEST(a, b, c, d, e)
    res = a & ", " & b & ", " & c & ", " & d & ", " & e

    Debug.Print (res)
    Dim regex As Object, str, result As String
    Set regex = CreateObject("VBScript.RegExp")

    With regex
      .Pattern = ",$| ,+|^,"
    End With

    Dim ReplacePattern As String
    ReplacePattern = ""

    res = regex.Replace(res, ReplacePattern)

    TEST = res
End Function

我该怎么做？

Answer 1

@ScottCraner对TEXTJOIN 的建议最为优雅（如果他希望将其发布为自己的，则将删除部分答案）

https://example.com/folder1/index.php

  

注意：这仅适用于Office 365+，但您始终可以create your own version of TEXTJOIN

---

另一种选择是遍历字符串Private Function nonEmptyFields(ParamArray strings() As Variant) As String nonEmptyFields = WorksheetFunction.TextJoin(",", True, Array(strings)) End Function 并将其添加到一起，具体取决于它们的内容（是填充还是空）

ParamArray

通过设置

都将产生预期的结果

Private Function nonEmptyFields(ParamArray strings() As Variant) As String

    Dim result As String
    Dim i As Byte

    For i = LBound(strings) To UBound(strings)
        If Len(strings(i)) <> 0 Then
            If result = vbNullString Then
                result = strings(i)
            Else
                result = result & "," & strings(i)
            End If
        End If
    Next i

    nonEmptyFields = result

End Function

Answer 2

我的丑陋解决方案保持相同的参数：

Function TEST(a, b, c, d, e)

    If a <> "" Then res = a

    If b <> "" Then
        If res <> "" Then
            res = res & ", " & b
        Else
            res = b
        End If
    End If

    If c <> "" Then
        If res <> "" Then
            res = res & ", " & c
        Else
            res = c
        End If
    End If

    If d <> "" Then
        If res <> "" Then
            res = res & ", " & d
        Else
            res = d
        End If
    End If

    If e <> "" Then
        If res <> "" Then
            res = res & ", " & e
        Else
            res = e
        End If
    End If

    TEST = res

End Function