map.js的编写（js编写一个对象的方式）

// 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 = new Array();
	var keys = this.keyArray();
	for (var i = 0; i < keys.length; i++) {
		values.push(this.container[keys[i]]);
	}
	return values;
}