VBA::整合数组

Question

我正在创建一个搜索功能，允许用户在数据库中同时搜索多达 3 个不同的属性（prop1、2 和 3），我通过将搜索到的 prop 的结果放入 VBA 中创建了这个子数组。但是，现在我有多达 3 个数组，我需要合并这些数组，以便只在结果中显示数组中重复的数据。关于如何 1) 仅查看用户正在搜索的属性的数组和 2) 仅将重复的数据放入最终数组中，以便我可以在结果范围中显示它，是否有任何建议？任何帮助是极大的赞赏！谢谢！

Answer 1

假设您的条目直接来自数据库，因此对于一个属性是唯一的，我可以考虑以下步骤来获得一个简单的解决方案：

1. 将数组合并在一起（prop1、prop2、prop3 > temp）
2. 计算每个元素的出现次数（在本示例代码中为 tempCount）

3. 根据对出现次数的了解，创建最终数组（这里称为result）

   Dim prop1() As Variant
   Dim prop2() As Variant
   Dim prop3() As Variant
   Dim temp() As Variant
   Dim tempCount() As Integer
   Dim result() As Variant
   
   ReDim temp(UBound(prop1) + UBound(prop2) + UBound(prop3) + 1)
   
   'merge arrays
   Dim i As Integer
   On Error Resume Next
       For i = 0 To UBound(temp)
       temp(i * 3) = prop1(i)
       temp(i * 3 + 1) = prop2(i)
       temp(i * 3 + 2) = prop3(i)
   Next i
   
   'count occurences
   ReDim tempCount(UBound(temp) + 1)
   Dim j As Integer
   For i = 0 To UBound(temp)
   tempCount(i) = 1
   For j = 0 To i - 1
   
   'comparison of elements
       If temp(i) = temp(j) Then
       tempCount(i) = tempCount(i) + 1
       End If
   Next j
   Next i
   
   ReDim result(UBound(temp) + 1)
   
   'if an element occurs 3 times, add it to result
   Dim count As Integer
   count = 0
   For i = 0 To UBound(tempCount)
       If tempCount(i) = 3 Then
           result(count) = temp(i)
           count = count + 1
       End If
   Next i
   

为了检查一些示例，我将其添加到代码中。它只是将数组 temp、result 和 tempCount 打印到 A、B 和 C 列。

'some sample arrays
prop1 = Array("a", "b", "c", "d", "e")
prop2 = Array("b", "c", "f")
prop3 = Array("b", "c", "d", "g")

'some sample Output

'temp
Cells(1, 1).Value = "temp:"
For i = 0 To UBound(temp)
    Cells(i + 2, 1).Value = temp(i)
Next i

'result
Cells(1, 2).Value = "result:"
For i = 0 To UBound(result)
    Cells(i + 2, 2).Value = result(i)
Next i

'count:
Cells(1, 3).Value = "count:"
For i = 0 To UBound(tempCount)
    Cells(i + 2, 3).Value = tempCount(i)
Next i

注意：tempCount 只保存元素被观看时的累积次数。