jQuery HashTable

最新推荐文章于 2020-07-05 22:11:01 发布

原创最新推荐文章于 2020-07-05 22:11:01 发布 · 491 阅读

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本文详细介绍了jQuery hashTable 的实现原理与使用方法，包括添加、设置、获取、删除、判断是否存在键值对等操作。


jQuery.hashTable = function () {
    this.items = new Array();
    this.itemsCount = 0;
    this.uniqueArray = new jQuery.uniqueArray();
    this.add = function (key, value) {
        if (!this.containsKey(key)) {
            this.items[key] = value;
            this.uniqueArray.add(key);
            this.itemsCount++;
        }
        else
            throw "key '" + key + "' allready exists."
    }

    this.set = function (key, value) {
        this.items[key] = value;
    }

    this.get = function (key) {
        if (this.containsKey(key))
            return this.items[key];
        else
            return null;
    }

    this.remove = function (key) {
        if (this.containsKey(key)) {
            delete this.items[key];
            this.uniqueArray.remove(key);
            this.itemsCount--;
        }
        else
            throw "key '" + key + "' does not exists."
    }
    this.containsKey = function (key) {
        return typeof (this.items[key]) != "undefined";
    }
    this.containsValue = function containsValue(value) {
        for (var item in this.items) {
            if (this.items[item] == value)
                return true;
        }
        return false;
    }
    this.contains = function (keyOrValue) {
        return this.containsKey(keyOrValue) || this.containsValue(keyOrValue);
    }
    this.clear = function () {
        this.items = new Array();
        this.uniqueArray = new jQuery.uniqueArray();
        itemsCount = 0;
    }
    this.size = function () {
        return this.itemsCount;
    }
    this.isEmpty = function () {
        return this.size() == 0;
    }
};

调用：


var hashTable = new jQuery.hashtable();
//...