Detaillierte Erläuterung der JavaScript-Datenstruktur-Wörterbuchklasse

/**
 * 构造函数
 * 基于对象存储数据
 * @constructor
 */function Dictionary(){
    this.datastore = new Object();
}
Dictionary.prototype = {    /* 修正constructor */
    constructor: Dictionary,    /* 统计个数 */
    size: function(){
        return Object.keys(this.datastore).length;
    },    /* 添加元素,给数组添加属性 */
    add: function(key, value){
        this.datastore[key] = value;
    },    /* 查找指定key的元素 */
    find: function(key){
        return this.datastore[key];
    },    /* 移除指定key的元素 */
    remove: function(key){
        delete this.datastore[key];
    },    /* 显示所有的键值对 */
    showAll: function(){
        for(var key in this.datastore){
            console.log(key + ": " + this.find(key));
        }
    }
};

var dic = new Dictionary();
dic.add("name", "ligang");
dic.add("age", 26);
dic.find("name");   // "ligang"dic.size();         // 2dic.showAll();      // "name: ligang" "age: 26"dic.remove("age");
dic.size();         // 1dic.showAll();      // "name: ligang"

/* 排序 */Dictionary.prototype.sort = function(){
    // 借助数组的默认排序
    var keys = Object.keys(this.datastore).sort();    
    // 新定义字典类
    var tempDic = new Dictionary();    
    for(var i = 0, len = keys.length; i < len; i++){        var key = keys[i];
        tempDic.add(key, this.find(key));
    }    
    return tempDic;
};

var dictionary = new Dictionary();
dictionary.add("b", 2);
dictionary.add("a", 1);
dictionary.add("c", 3);
dictionary.showAll();   // "b: 2" "a: 1" "c: 3"dictionary.sort().showAll();    // "a: 2" "b: 1" "c: 3"