function Dictionary() {
var items =
{};
//判断是否包含Key值
this.has =
function(key) {
return key
in items;
};
//赋值，添加键值对
this.
set =
function(key, value) {
items[key] =
value;
};
//移除Key值
this.remove =
function(key) {
if (
this.has(key)) {
delete items[key];
return true;
}
return false;
};
//通过Key值获取Value值
this.
get =
function(key) {
return this.has(key) ?
items[key] : undefined;
};
//获取所有的Key值
this.keys =
function() {
var keys =
[];
for (
var k
in items) {
keys.push(k);
}
return keys;
};
//获取所有的Value值
this.values =
function() {
var values =
[];
for (
var k
in items) {
if (
this.has(k)) {
values.push(items[k]);
}
}
return values;
};
//初始化键值对
this.clear =
function() {
items =
{};
};
//获取键值对的个数
this.size =
function() {
var count =
0;
for (
var prop
in items) {
if (items.hasOwnProperty(prop)) {++
count;
}
}
return count;
};
//获取所有的键值对
this.getItems =
function() {
return items;
};
}
使用方法如下图：
回到顶部
转载于:https://www.cnblogs.com/ZhangJiXuan/p/9813754.html
