VBS ArrayList Class vbs中的数组类-巨人网络通讯

Class ArrayList
Private items()
Private size

  Private Sub Class_Initialize
size = 0
ReDim items(1)
  End Sub

  Private Sub Class_Terminate
items = null
  End Sub

Public Function Add(ByVal value)
       If (size = Ubound(items)) Then EnsureCapacity((size + 1))

       items(size) = value
       size = size + 1
       Add = size
End Function

Public Property Get Item(index)
  Item = items(index)
End Property

Public Property Let Item(index, vObject)
  items(index) = vObject
End Property

Property Get Count
  Count = size
End Property

Public Property Get Capacity()
  Capacity = Ubound(items)
End Property

Public Property Let Capacity(value)
            If (value > Ubound(items)) Then
                  If (value  size) Then Err.Rise 6

                  If (value > 0) Then
                        ReDim Preserve items(value)
                  Else
                        ReDim Preserve items(3)
                  End If
            End If
End Property

Private Sub EnsureCapacity(ByVal min)
       If (Ubound(items)  min) Then
      Dim num1 : num1 = IIf((Ubound(items) = 0), 4, (Ubound(items) * 2))
      If (num1  min) Then num1 = min
      Capacity = num1
       End If
End Sub

Private Function IIf(j, r1, r2)
  IF (j) Then
   IIf = r1
  Else
   IIf = r2
  End IF
End Function

End Class

示例:

Dim al : Set al = new ArrayList
al.Add(1)
al.Add(2)
al.Add(3)
al.Add(4)
al.Add(5)
al.Add(6)
al.Add(7)
al.Add(8)
al.Add(9)
al.Add(10)

For i = 0 To al.Count -1
w("Index" i ": " al.Item(i))
Next

w("Count: " al.Count)
w("Capacity: " al.Capacity)

Sub w(o)
Response.Write(o "br />")
End Sub

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