How to implement array classes in ArrayList Class vbs by VBS
This article mainly shows you "VBS how to achieve array classes in ArrayList Class vbs", the content is easy to understand, clear, hope to help you solve your doubts, the following let Xiaobian lead you to study and learn "VBS how to achieve array classes in ArrayList Class vbs" this article.
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
Example:
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 & "")
End Sub
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