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/********************jsmap.js**************************/
/////// map Àà
function classMap() {
  this.map = new Array();
 
  var struct = function(key,
value){
      this.key = key;
   this.value = value;
 };
 
 
this.lookUp = function (key){
   for (var i = 0; i <
this.map.length; i++)
   {
  if ( this.map[i].key === key )
  {
   
return this.map[i].value;
  }
   }  
   return null;
 };
 

  this.setAt = function (key, value){ 
      for (var i = 0; i
< this.map.length; i++)
   {
  if ( this.map[i].key === key )
  {
   
this.map[i].value = value;
    return;
  }
   }  
  
this.map[this.map.length] = new struct(key,value); 
 };
 
 
this.removeKey = function removeKey(key){
   var v;
   for (var i =
0; i < this.map.length; i++)
   {
  v = this.map.pop();
  if
( v.key === key )
    continue;
   
  this.map.unshift(v);
  
}
 };
 
  this.getCount = function(){
   return
this.map.length;
 };
 
  this.isEmpty = function(){
  
return this.map.length <= 0;
 };
}
////////////////////////////////////////////////////////////////////////////////////////////////
/********************µ÷ÓÃ***********************/
window.onload = function(){
  var map = new classMap();
  alert("is the map empty? " +
map.isEmpty());
  // string to array
  map.setAt("sw1", "aaaa


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