检查数组中是否存在值

Question

我正在使用这个问题的函数，但是，它似乎不适用于我的情况。

基本上，这个脚本通过一个列选择不同的值并用它们填充数组arr 。 首先， If检查列是否已经结束，那么为了避免调用空数组，我有第一个IfElse ，最后我想检查一个非空数组的cell字符串。 如果它不存在，我想添加它。

Public Function IsInArray(stringToBeFound As String, arr As Variant) As Boolean
  IsInArray = (UBound(Filter(arr, stringToBeFound)) > -1)
End Function

Sub SelectDistinct()

    Dim arr() As String
    Dim i As Integer
    Dim cells As Range

    Set cells = Worksheets("types").Columns("A").Cells

    i = 0
    For Each cell In cells
        If IsEmpty(cell) Then
            Exit For
        ElseIf i = 0 Then
            ReDim Preserve arr(i)
            arr(UBound(arr)) = cell
            i = i + 1
        ElseIf IsInArray(cell.Value, arr) = False Then
            ReDim Preserve arr(i)
            arr(UBound(arr)) = cell
            i = i + 1
        End If
    Next cell
End Sub

由于某种原因，它会在调用IsInArray函数时抛出“下标超出范围”错误。 有人能让我知道我哪里出错吗？

Answer 1

下面是我如何使用Application.Match函数而不是另一个UDF对一维数组执行此操作。

我已经使用Do...While循环合并了一些If / ElseIf逻辑，然后使用Match函数检查数组中是否存在单元格值。 如果它不存在，则将其添加到阵列并继续到您范围内的下一个单元格。

Sub SelectDistinct()

Dim arr() As String
Dim i As Integer
Dim cells As Range
Dim cl As Range
Dim foundCl As Boolean

    Set cells = Worksheets("Sheet6").Columns(1).cells

    Set cl = cells.cells(1)

    Do
        If IsError(Application.Match(cl.Value, arr, False)) Then
            ReDim Preserve arr(i)
            arr(i) = cl
            i = i + 1
        Else:
            'Comment out the next line to completely ignore duplicates'
            MsgBox cl.Value & " already exists!"

        End If

        Set cl = cl.Offset(1, 0)
    Loop While Not IsEmpty(cl.Value)

End Sub

Answer 2

简短的回答对的呼唤你的“下标超出范围”错误IsInArray功能”的问题是变量arr变暗为Variant 。对于Filter功能在工作IsInArray UDF arr必须调节为String 。

您可以尝试以下代码：1）设置过滤的String数组，以及2）避免在循环中放置Redim Preserve （这是一个代价高昂的函数）：

Sub FilteredValuesInArray()
'http://stackoverflow.com/questions/16027095/checking-if-value-present-in-array
Dim rng As Range
Dim arrOriginal() As Variant, arrFilteredValues() As String
Dim arrTemp() As String
Dim strPrintMsg As String    'For debugging
Dim i As Long, lCounter As Long

Set rng = Cells(1, 1).CurrentRegion    'You can adjust this how you want
arrOriginal = rng

'Convert variant array to string array
ReDim arrTemp(LBound(arrOriginal) - 1 To UBound(arrOriginal) - 1)
For i = LBound(arrOriginal) To UBound(arrOriginal)
    arrTemp(i - 1) = CStr(arrOriginal(i, 1))
Next i

'Setup filtered values array
ReDim arrFilteredValues(LBound(arrTemp) To UBound(arrTemp))

On Error Resume Next
Do
    arrFilteredValues(lCounter) = arrTemp(0)
    'Save non matching values to temporary array
    arrTemp = Filter(arrTemp, arrTemp(0), False)
    'If error all unique values found; exit loop
    If Err.Number <> 0 Then Exit Do
    lCounter = lCounter + 1
Loop Until lCounter >= UBound(arrFilteredValues)
On Error GoTo 0
'Resize array to proper bounds
ReDim Preserve arrFilteredValues(LBound(arrFilteredValues) To lCounter - 1)

'====DEBUG CODE
For i = LBound(arrFilteredValues) To UBound(arrFilteredValues)
    strPrintMsg = strPrintMsg & arrFilteredValues(i) & vbCrLf
Next i
Debug.Print vbTab & "Filtered values are:" & vbCrLf & strPrintMsg
'====END DEBUG CODE
End Sub

Answer 3

这是一个简单而又肮脏的黑客：

Function InStringArray(str As String, a As Variant) As Boolean
    Dim flattened_a As String
    flattened_a = ""

    For Each s In a
        flattened_a = flattened_a & "-" & s
    Next

    If InStr(flattened_a, str) > 0 Then
        InStringArray = True
    Else
        InStringArray = False
    End If
End Function