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  • js 实现ActiveXObject("Scripting.Dictionary") 功能

    /*
        字典
       ActiveXObject("Scripting.Dictionary")
       项目中用到的ActiveXObject("Scripting.Dictionary")
       但是要兼容谷歌 ,所以就自己写了一个字典
    */
    
    var Dictionary = function () {
        var arr;
        var length = arr ? arr.length : 0;
    };
    Dictionary.prototype.add = function (Key, Item) {
        if (this.arr == null || this.arr.length == 0) {
            this.arr = new Array();
        }
    
        if (this.exists(Key)) {
            return; //也可以改为抛出异常
        }
    
        this.arr.push(new item(Key, Item));
        this.length = this.arr ? this.arr.length : 0;
    }
    
    //是否存在
    Dictionary.prototype.exists = function (Key) {
        var exist = false;
        if (this.arr == null || this.arr.length == 0) {
            exist = false;
        }
    
        for (var i = 0; i < this.arr.length; i++) {
            if (Key == this.arr[i].Key) {
                exist = true;
                break;
            }
        }
    
        return exist;
    }
    
    Dictionary.prototype.remove = function (Key) {
        if (this.arr == null || this.arr.length == 0) {
            return;
        }
        var index = 0;
        for (var i = 0; i < this.arr.length; i++) {
            if (Key == this.arr[i].Key) {
                index = i;
                break;
            }
        }
        this.arr.splice(index, 1);
    
        this.length = this.arr ? this.arr.length : 0;
    }
    
    Dictionary.prototype.removeAll = function () {
        if (this.arr == null || this.arr.length == 0) {
            return;
        }
    
        this.arr.length = 0;
        this.length = this.arr.length;
    }
    Dictionary.prototype.set = function (Key, item) {
        if (this.arr == null || this.arr.length == 0) {
            return;
        }
    
        for (var i = 0; i < this.arr.length; i++) {
            if (Key == this.arr[i].Key) {
                this.arr[i].Item = item;
                break;
            }
        }
    }
    
    Dictionary.prototype.keys = function () {
        var arrKey = new Array();
        if (this.arr == null || this.arr.length == 0) {
            //return;
        }
        else {
    
            var arrKey = new Array();
            for (var i = 0; i < this.arr.length; i++) {
                arrKey.push(this.arr[i].Key);
            }
        }
    
        return arrKey;
    }
    
    function item(Key, Item) {
        this.Key = Key;
        this.Item = Item;
    }
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  • 原文地址:https://www.cnblogs.com/xiaoyu369/p/3306067.html
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