js是有Dictionary对象的，只是只有在IE浏览器下可以使用。
var dic = new ActiveXObject("Scripting.Dictionary");
但是在其它浏览器下，就需要js实现Dictionary:
var Dictionary=function() {
this.elements = new Array();
//Length of Dictionary
this.length = function () {
return this.elements.length;
};
//Check whether the Dictionary is empty
this.isEmpty = function () {
return (this.length() < );
};
//remove all elements from the Dictionary
this.removeAll = function () {
this.elements = new Array();
};
//get specify element of the dictionary
this.element = function (index) {
var rlt = null;
if (index >= && index < this.elements.length) {
rlt = this.elements[index];
}
return rlt;
}
//check whether the Dictionary contains this key
this.Exists = function (key) {
var rlt = false;
try {
for (var i = , iLen = this.length(); i < iLen; i++) {
if (this.elements[i].key == key) {
rlt = true;
break;
}
}
}
catch (ex) {
}
return rlt;
};
//check whether the Dictionary contains this value
this.containsValue = function (value) {
var rlt = false;
try {
for (var i = , iLen = this.length(); i < iLen; i++) {
if (this.elements[i].value == value) {
rlt = true;
break;
}
}
}
catch (ex) {
}
return rlt;
};
//remove this key from the Dictionary
this.remove = function (key) {
var rlt = false;
try {
for (var i = , iLen = this.length(); i < iLen; i++) {
if (this.elements[i].key == key) {
this.elements.splice(i, );
rlt = true;
break;
}
}
}
catch (ex) {
}
return rlt;
};
//add this key/value to the Dictionary,if key is exists,replace the value
this.add = function (key, value) {
this.remove(key);
this.elements.push({
key: key,
value: value
});
};
//add this key/value to the Dictionary,if key is exists,append value
this.set = function (key, value) {
var arr = this.getItem(key);
if (arr != null) {
if (typeof(arr) == "object") {
arr.unshift.apply(arr, value);
value = arr;
}
else {
var array = [];
array.push(arr);
array.unshift.apply(array, value);
value = array;
}
this.remove(key);
}
this.elements.push({
key: key,
value: value
});
}
//get value of the key
this.getItem = function (key) {
var rlt = null;
try {
for (var i = , iLen = this.length(); i < iLen; i++) {
if (this.elements[i].key == key) {
rlt = this.elements[i].value;
break;
}
}
}
catch (ex) {
}
return rlt;
};
//get all keys of the dictionary
this.keys = function () {
var arr = [];
for (var i = , iLen = this.length(); i < iLen; i++) {
arr.push(this.elements[i].key);
}
return arr;
}
//get all values of the dictionary
this.values = function () {
var arr = [];
for (var i = , iLen = this.length(); i < iLen; i++) {
arr.push(this.elements[i].value);
}
return arr;
}
}
调用如下：
var dicImg = new Dictionary(); dicImg.add(name, nameStr);
var isExist = dicImg.Exists(fs);
var dicValue = dicImg.getItem(arrKeys[i]);
遍历：
var arrkey = dicImg.keys();
$.each(arrkey, function (i, fe) {
var key = fe;
var value = dicImg.getItem(fe); });