Js Map

js中Map的使用
// 定义map
function Map() {
this.container = {};
}
// 将key-value放入map中
Map.prototype.put = function(key, value) {
try {
if (key != null && key != "")
this.container[key] = value;
} catch (e) {
return e;
}
};
// 根据key从map中取出对应的value
Map.prototype.get = function(key) {
try {
return this.container[key];
} catch (e) {
return e;
}
};
// 判断map中是否包含指定的key
Map.prototype.containsKey = function(key) {
try {
for (var p in this.container) {
if (this.p == key)
return true;
}
return false;
} catch (e) {
return e;
}
}
// 判断map中是否包含指定的value
Map.prototype.containsValue = function(value) {
try {
for (var p in this.container) {
if (this.container[p] === value)
return true;
}
return false;

} catch (e) {
return e;
}
};
// 删除map中指定的key
Map.prototype.remove = function(key) {
try {
delete this.container[key];
} catch (e) {
return e;
}
};
// 清空map
Map.prototype.clear = function() {
try {
delete this.container;
this.container = {};
} catch (e) {
return e;
}
};
// 判断map是否为空
Map.prototype.isEmpty = function() {
if (this.keyArray().length == 0)
return true;
else
return false;
};
// 获取map的大小
Map.prototype.size = function() {
return this.keyArray().length;
}
// 返回map中的key值数组
Map.prototype.keyArray = function() {
var keys = new Array();
for (var p in this.container) {
keys.push(p);
}
return keys;
}
// 返回map中的value值数组
Map.prototype.valueArray = function() {
var values
4000
= new Array();
var keys = this.keyArray();
for (var i = 0; i < keys.length; i++) {
values.push(this.container[keys[i]]);
}
return values;
}