ASP Array function enhance

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asp中对数组的操作功能太弱,所以写了一个ArrayList类(参考c#中的ArrayList类),可以满足对数组操作的大部分功能.

对数组操作要注意的一些问题:
1,LBound()和UBound()是取得数组里最小的和最大的索引值,并不是数组的长度,
数组的长度是:UBound()+1
2,有时要动态改变数组大小,所以要先声明一个空的数组:
    Dim arr()
    使用这种方式声明的空数组如果用LBound()和UBound()取值的话会出现错误,但可以使用For Each:
    Dim arr()
    For Each v In arr
        Response.Write v
    Next
   这样就不会出错了

  另一种声明空数组的方法是:
   Dim arr
   arr=array()
   这样的话使用LBound(arr)和UBound(arr)则分别返回0和-1.

 为了避免发生错误,我推荐使用第二种方法声明空数组的

 

 程序代码

<%
        '/******************************
        '类名:ArrayList
        '名称:数组操作类
        '日期:2007-11-6
        '作者:西楼冷月
        '网址:www.xilou.net | www.chinaCMS.org
        '描述:对数组的各种操作
        '版权:转载请注名出处,作者
        '******************************
    '***************ArrayList属性***************
    'ArrayList.Length:数组长度
    'ArrayList.Item:取得ArrayList某个索引的值,相当于ArrayList.GetValue()方法
    '***************ArrayList方法***************
    '---数组添加:
    'ArrayList.Add(v):在ArrayList尾部添加一个元素,返回该元素所在的索引值
    'ArrayList.AddArray(arr):在ArrayList尾部附加一个数组
    'ArrayList.Insert(index,v):在ArrayList的index处插入一个值,原先的index和之后的值都往后移
    'ArrayList.InsertArray(index,arr):在ArrayList的index处插入一个数组,原先的index和之后的值都往后移
    '---数组更新:
    'ArrayList.Update(index,v):更新索引为index处的值
    '---数组删除:
    'ArrayList.Remove(v):从ArrayList中删除第一个匹配项,注意是第一个,将会得到一新的数组
    'ArrayList.RemoveAt(index):移除ArrayList的指定索引处的元素,将会得到一新的数组
    'ArrayList.Splice(m,n):从一个数组中移除从索引m到索引n的一段元素,并返回这段移除的数组
    'ArrayList.Clear()清空数组,数组将变为空,长度Length=0
    '---数组查找:
    'ArrayList.IndexOf(v):查找,返回ArrayList第一个匹配项的索引。没找到返回-1。
    'ArrayList.LastIndexOf(v):返回ArrayList的最后一个匹配项的索引。没找到返回-1。
    '---返回数组中的值:
    'ArrayList.GetValue(index)取得ArrayList某个索引的值
    'ArrayList.Slice(m,n)返回ArrayList从m到n的一段数组
    'ArrayList.GetArray()返回整个Array数组
    '---数组其他操作:
    'ArrayList.Reverse()将整个 ArrayList 中元素的顺序反转
    'ArrayList.Implode(separator)返回字符串值,元素由指定的分隔符分隔开来
        '******************************/

Class ArrayList

        Private arrList'//内部数组
    Private arrLength'//记录数组的长度
    
    Private Sub Class_Initialize()
        arrList=Array()
        arrLength=0
    End Sub
    
    Private Sub Class_Terminate()
        Erase arrList
        End Sub
    
    '//数组长度,只读
    Public Property Get Length
        Length=arrLength
    End Property

    '//获取或设置指定索引处的元素
    Public Default Property Get Item(index)
        If Not isNum(index) Then
            showErr "ArrayList.Item(index),非法的参数index":Exit Property
        End If
        If index < 0 or index > arrLength-1 Then
            showErr "ArrayList.Item(index),index下标越界":Exit Property
        End If
        setValue Item,arrList(index)
    End Property
    Public Property Let Item(index,v)
        If Not isNum(index) Then
            showErr "ArrayList.Item(index,v),非法的参数index":Exit Property
        End If
        If index < 0 or index > arrLength-1 Then
            showErr "ArrayList.Item(index,v),index下标越界":Exit Property
        End If
        setValue arrList(index),v
    End Property
    
    '//取得某个索引的值
    Public Function GetValue(index)
        If Not isNum(index)  Then
            showErr "ArrayList.GetValue(index),非法的参数index":Exit Function
        End If
        On Error Resume Next
        setValue GetValue,arrList(index)
        If Err Then showErr "ArrayList.GetValue(index),index"&Err.Description:Err.Clear:Exit Function
    End Function
    
        '//返回整个Array数组
        Public Function GetArray()
        GetArray=arrList
    End Function
    
    '//添加元素,将值添加到ArrayList的结尾处,返回当前元素的索引值
    Public Function Add(v)
            ReDim Preserve arrList(arrLength)
        setValue arrList(arrLength),v
        Add=arrLength
        arrLength=arrLength+1
    End Function

    '//将数组添加到ArrayList的结尾处
    Public Sub AddArray(arr)
        If Not IsArray(arr) Then showErr "ArrayList.AddArray(arr),arr参数不是数组:":Exit Sub
        Dim I,L,J
        On Error Resume Next
            If arrLength = 0 Then '//如果ArrayList为空则直接附值
            arrList=arr
            arrLength=arrLength+UBound(arr)+1
        Else
                L=arrLength+UBound(arr)'//新的数组长度
            J=0
                ReDim Preserve arrList(L)
            For I = arrLength To L
            setValue arrList(I),arr(J)
                J=J+1
            Next
            arrLength=arrLength+UBound(arr)+1
        End If
        If Err Then showErr "ArrayList.AddArray(arr)"&Err.Description:Err.Clear:Exit Sub
        
    End Sub

    '//将元素插入ArrayList的指定index索引处,原有的arrList(index)及后面的元素都往后排
    Public Sub Insert(index,v)
        If Not isNum(index)  Then
            showErr "ArrayList.Insert(index,v),非法的参数index":Exit Sub
        End If
        Dim I,v2
        If index<arrLength And index>=0 Then
            ReDim Preserve arrList(arrLength)
        arrLength=arrLength+1
        For I = index To arrLength - 1
            setValue v2,arrList(I)'//交换值
            setValue arrList(I),v
            setValue v,v2
        Next
        Else
                showErr "ArrayList.Insert(index,v),index下标越界"
        End If
    End Sub

    '//将一组数组插入到指定的index处
    Public Sub InsertArray(index,arr)
        If Not isNum(index) Then
            showErr "ArrayList.InsertArray(index,arr),非法的参数index":Exit Sub
        End If
        If index < 0 or index > arrLength-1 Then
            showErr "ArrayList.InsertArray(index,arr),index下标越界":Exit Sub
        End If
        If Not IsArray(arr) Then showErr "ArrayList.InsertArray(index,arr),arr参数不是数组":Exit Sub
        Dim I,L1,L2,J:J=0
        On Error Resume Next
        L1=UBound(arr)
        L2=arrLength+L1
        ReDim Preserve arrList(L2)
        For I = arrLength -1 To index Step -1
        setValue arrList(I+L1+1),arrList(I)'//把index之后的值往后移
        Next
        For I = index To index+L1
        setValue arrList(I),arr(J)
        J=J+1
        Next
        If Err Then showErr "ArrayList.InsertArray(index,arr),"&Err.Description:Err.Clear:Exit Sub
        arrLength=arrLength+L1+1'//新的数组长度
    End Sub

    '//更新数组中索引为index的对应值
    '//by xilou 39949376
    Public Sub Update(index,v)
        If Not isNum(index) Then
            showErr "ArrayList.Update(index,v),非法的参数index:":Exit Sub
        End If
        If index < 0 or index > arrLength-1 Then
            showErr "ArrayList.Update(index,v),index下标越界":Exit Sub
        End If
        setValue arrList(index),v
    End Sub
    
    '//从ArrayList中删除第一个匹配项,注意是第一个,将会得到一新的数组
    Public Sub Remove(v)
        Dim I,index
        index = -1 '//第一个匹配的索引
        For I = 0 To arrLength - 1
            If arrList(I)=v Then index = I : Exit For
        Next
        If index <> -1 Then
            For I = index To arrLength - 2
            setValue arrList(I),arrList(I+1)'//值向前填充
        Next
        ReDim Preserve arrList(arrLength-1)'//收缩数组
        arrLength = arrLength - 1
        End If
    End Sub

    '//移除ArrayList的指定索引处的元素,将会得到一新的数组
    Public Sub RemoveAt(index)
        If Not isNum(index) Then
            showErr "ArrayList.RemoveAt(index),非法的参数index":Exit Sub
        End If
        If index < 0 or index > arrLength-1 Then
            showErr "ArrayList.RemoveAt(index,v),index下标越界":Exit Sub
        End If
        If index > 0 Then
            For I = index To arrLength - 2
            setValue arrList(I),arrList(I+1)'//值向前填充
            Next
            ReDim Preserve arrList(arrLength-1)'//收缩数组
            arrLength = arrLength - 1
        End If
    End Sub

    '//从一个数组中移除从索引m到索引n的一段元素,并返回这段移除的数组
    Public Function Splice(m,n)
        If Not isNum(m) Then
            showErr "ArrayList.Splice(m,n),非法的参数m":Exit Function
        End If
        If Not isNum(n) Then
            showErr "ArrayList.Splice(m,n),非法的参数n":Exit Function
        End If
        If m < 0 or m > arrLength - 1 Then
            showErr "ArrayList.Splice(),m下标越界":Exit Function
        End If
        If n < 0 or n > arrLength - 1 Then
            showErr "ArrayList.Splice(),n下标越界":Exit Function
        End If
        Dim newArr,x,L,I,J
        newArr=Array()
        If m > n Then x=m:m=n:n=x '//交换数值
        L=n-m
        ReDim Preserve newArr(L)
        For I = m To n      
        setValue newArr(J),arrList(I)'要移除的元素
        J=J+1
        Next
        '//把n后面的元素的值移前
        For I = (n+1) To arrLength -1
        setValue arrList(I-L-1),arrList(I)
        Next
        arrLength=arrLength-L-1
        ReDim Preserve arrList(arrLength)
        Splice=newArr
    End Function

    '//清空数组,数组将变为空,长度Length=0
    Public Sub Clear()
        Erase arrList
        arrLength=0
    End Sub

    '//将整个 ArrayList 中元素的顺序反转
    Public Sub Reverse()
        Dim L,I,J,v
        J=arrLength-1
            If arrLength > 0 Then
            L=Int(arrLength/2)
        For I = 0 To L-1
            setValue v,arrList(I)
            setValue arrList(I),arrList(J)
            setValue arrList(J),v
            J=J-1
        Next
        End If
    End Sub

    '//返回字符串值,其中包含了连接到一起的数组的所有元素,元素由指定的分隔符分隔开来
    Public Function Implode(separator)
        On Error Resume Next
        Implode=Join(arrList,separator)
        If Err Then showErr "ArrayList.Implode(separator),"&Err.Description:Err.Clear:Exit Function
    End Function

    '//返回ArrayList从m到n的一段数组
    Public Function Slice(m,n)
        If Not isNum(m) Then
            showErr "ArrayList.Slice(m,n),非法的参数m":Exit Function
        End If
        If Not isNum(n) Then
            showErr "ArrayList.Slice(m,n),非法的参数n":Exit Function
        End If
        If m < 0 or m > arrLength-1 Then
            showErr "ArrayList.Slice(m,n),m下标越界":Exit Function
        End If
        If n < 0 or n > arrLength-1 Then
            showErr "ArrayList.Slice(m,n),n下标越界":Exit Function
        End If
        Dim I,J,newArr()
        J=0
        If m<=n Then
            ReDim Preserve newArr(n-m)
        For I = m To n
            setValue newArr(J),arrList(I)
            J=J+1
        Next
        Else
            ReDim Preserve newArr(m-n)
        For I = n To m
            setValue newArr(J),arrList(I)
            J=J+1
        Next
        End If
        Slice=newArr
        Erase newArr
    End Function
    
    '//查找,返回ArrayList第一个匹配项的从零开始的索引。没找到返回-1。
    '//by xilou 39949376
    Public Function IndexOf(v)
        Dim I
        For I = 0 To arrLength - 1
        If arrList(I)=v Then IndexOf=I:Exit Function
        Next
        IndexOf=-1
    End Function

    '//返回ArrayList的最后一个匹配项的从零开始的索引。没找到返回-1。
    Public Function LastIndexOf(v)
        Dim I
        If arrLength=0 Then
            LastIndexOf=-1:Exit Function
        Else
            For I = (arrLength-1) To 0 Step -1
            If arrList(I)=v Then LastIndexOf=I:Exit Function
            Next
        End If
        LastIndexOf=-1
    End Function
    
    '//将v2赋值给v1,设置不同的值(对象或普通值)
    Private Sub setValue(byref v1,v2)
        If IsObject(v2) Then
            Set v1=v2
        Else
            v1=v2
        End If
    End Sub
    '//判断是否是数字,返回true or false
    Private Function isNum(v)
        If Not IsNumeric(v) or IsEmpty(v) Then
            isNum=False
        Else
            isNum=True
        End If
    End Function
    '//显示错误
    Private Sub showErr(errInfo)
        Response.Write "<div id=""ERRORINFO"" style=""font-size:12px;color:#990000;font-family:""新宋体"", Arial"">"
        Response.Write errInfo
        Response.Write "</div>"
        'Response.End()
    End Sub
End Class
%>