ASP实现类似hashMap功能的类

<% 
set jb51 = new Jb 
'给mp对象赋值 
jb51.putv "a","jb51.net" 
jb51.putv "b","www.jb51.net" 
jb51.putv "c","//www.jb51.net" 
response.write "[键值数量]:"&jb51.count 
response.write "<br>" 
response.write "[a]:"&jb51.getv("a") 
response.write "<br>" 
response.write ":"&jb51.getv("b") 
response.write "<br>" 
response.write "[c]:"&jb51.getv("c") 
response.write "<hr>" 
'删除key为"b"的键值 
jb51.delv "b" 
response.write "[键值数量]:"&jb51.count 
response.write "<br>" 
response.write "[a]:"&jb51.getv("a") 
response.write "<br>" 
response.write ":"&jb51.getv("b") 
response.write "<br>" 
response.write "[c]:"&jb51.getv("c") 
response.write "<hr>" 
'清空jb51的所有值 
jb51.clear 
'给key为"c"的键值重新赋值 
jb51.putv "c","//www.jb51.net" 
response.write "[键值数量]:"&jb51.count 
response.write "<br>" 
response.write "[a]:"&jb51.getv("a") 
response.write "<br>" 
response.write ":"&jb51.getv("b") 
response.write "<br>" 
response.write "[c]:"&jb51.getv("c") 
response.write "<hr>" 
Class MtMap 
private arr() 
private arr_len 
'构造函数 
private Sub Class_Initialize 
'其中 arr(0,n)为key,arr(1,n)为value 
arr_len = 0 
redim arr(1,arr_len) 
end sub 

'赋值,如果存在则覆盖 
public sub putv(k,v) 
dim is_update 
is_update = false 
arr_len = ubound(arr,2) 
for i=0 to arr_len-1 
if k=arr(0,i) then 
arr(1,i) = v 
is_update = true 
exit for 
end if 
next 
if not is_update then 
arr_len = arr_len +1 
redim preserve arr(1,arr_len) 
arr(0,arr_len) = k 
arr(1,arr_len) = v 
end if 
end sub 
'取得key为"k"的键值 
public function getv(k) 
dim v 
v = "" 
for i=0 to arr_len 
if k=arr(0,i) then 
v = arr(1,i) 
exit for 
end if 
next 
getv = v 
end function 

'删除key为"k"的键值 
public sub delv(k) 
arr_len = ubound(arr,2) 
for i=0 to arr_len 
if k=arr(0,i) then 
v = arr(1,i) 
for k = i to arr_len-1 
arr(0,k) = arr(0,k+1) 
arr(1,k) = arr(1,k+1) 
next 
arr_len = arr_len - 1 
redim preserve arr(1,arr_len) 
exit for 
end if 
next 
end sub 

'获得jb51中键值的数量 
public property get count() 
count = arr_len 
end property 

'清空jb51中所有的键值 
public sub clear() 
arr_len = 0 
redim arr(1,1) 
end sub 
end class 
%>