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| '
' ASP/VBScript Dictionary extract
' Author: WangYe
' For more information please visit
' http://wangye.org/
' This code is distributed under the BSD license
'
' collection 集合或者字典，可以通过For Each访问的
' Request.Form 或者 Request.QueryString
' specified 指定必须存在的属性，假如该属性不存在，将自动创建一个
' prefix 每个属性的前缀修饰
' callback 对于集合或者字典的每个元素(key-value)的值进行函数调用
' 函数原型：
' Function filter(key, value)
' filter = value
' End If
' 最终值将以该函数返回的值为准
'
Function extract(collection, ByVal specified, prefix, callback)
Dim VarName, VarValue, DynObj, searchKey
specified = "," & Replace(specified, " ", "") & ","
Set DynObj = New DynamicObject
For Each key In collection
searchKey = "," & key & ","
If InStr(1, specified, searchKey, 1)>0 Then
specified = Replace(specified, searchKey, "")
If Left(specified, 1) <> "," Then
specified = "," & specified
End If
If Right(specified, 1) <> "," Then
specified = specified & ","
End If
End If
VarName = prefix & key
VarValue = collection(key)
If callback<>"" Then
VarValue = GetRef(callback)(key, VarValue)
End If
DynObj.add VarName, VarValue, PROPERTY_ACCESS_READONLY
Next
specified_array = Split(specified, ",")
Dim i
For i = LBound(specified_array) To UBound(specified_array)
If specified_array(i)<>"" Then
DynObj.add prefix & specified_array(i), "", _
PROPERTY_ACCESS_READONLY
End If
Next
Set extract = DynObj.GetObject()
End Function |