javascript 实现 Map 工具包

(function() {    window['XR'] = {};    var midContainer = new Array();    var mapContainer = new Array();    var MAPID = 0;    function Map(mid) {        var type = typeof (mid);        if ((type != "string") && (type != "number")) {            throw "Map id must be a string or number!";        }        for (var _c = 0; midContainer[_c]; _c++) {            if (mid == midContainer[_c])                throw "You have already created Map : " + mid;        }        var identify = MAPID++;        midContainer[identify] = mid;        mapContainer[identify] = {};        mapContainer[identify]["id"] = mid;        this.id = mid;        this.prefix = "K_";        this.toString = function() {            return "This is a map object!";        }    }    Map.prototype.getMapId = function() {        return this.id;    }    Map.prototype.getMapIndex = function() {        var index = -1;        for (var _i = 0; mapContainer[_i]; _i++) {            if (this.id == mapContainer[_i]["id"]) {                index = _i;            }        }        return index;    }    Map.prototype.put = function(key, value) {        if ( typeof (key) != "string") {            throw "key must be a string!";        }        if ( typeof (value) == "function") {            throw "value shouldn't be a function!";        }        if (this.trimStr(key) == "") {            throw "key is empty!";        }        var index = -1;        index = this.getMapIndex();        if (index != -1) {            key = this.prefix + key;            mapContainer[index][key] = value;        }    }    Map.prototype.get = function(key) {        var index = -1;        index = this.getMapIndex();        var value = "";        if (index != -1) {            var _tV = mapContainer[index];            key = this.prefix + key;            value = (_tV.hasOwnProperty(key)) ? _tV[key] : "You haven't save this key's value!";        } else {            value = "Current Map has lost connection!";        }        return value;    }    Map.prototype.deleteKey = function(key) {        var index = -1;        index = this.getMapIndex();        key = this.prefix + key;        var _tV = mapContainer[index];        if (_tV.hasOwnProperty(key)) {            delete _tV[key];        }    }    Map.prototype.clearMap = function() {        var index = -1;        index = this.getMapIndex();        var maxId = MAPID - 1;        if (index <= maxId) {            for (var t = index; t < maxId; t++) {                mapContainer[t] = mapContainer[t + 1];                midContainer[t] = midContainer[t + 1];            }            mapContainer[maxId] = null;            midContainer[maxId] = null;            this.id = null;            this.toString = null;            MAPID--;        }    }    Map.prototype.trimStr = function(str) {        return str.replace(/(^\s*)|(\s*$)/g, "");    }    Map.prototype.isEmpty = function() {        var index = -1;        index = this.getMapIndex();        if (index != -1) {            for (var attr in mapContainer[index]) {                //alert(mapContainer[index][attr]);                if (attr != "id") {                    return false;                }            }        }        return true;    }    Map.prototype.showMap = function() {        var index = -1;        index = this.getMapIndex();        var str = "";        if (this.id != null) {            str = "Map:\t" + this.id + "\n";            for (var attr in mapContainer[index]) {                if (attr != "id") {                    str += attr + ":\t" + mapContainer[index][attr] + "\n";                }            }        } else {            str = "This Map doesn't exist!";        }        alert(str);        return str;    }    window['XR']['Map'] = Map;})()//TEST CODES------------function test() {    with (XR) {        var m1 = new Map("ddd");        m1.put("dd", "dfdfdf");        m1.put("dd2", "8yeah!");        //alert(m1.get("dd"));        //alert(m1.isEmpty());        m1.deleteKey("dd");        m1.clearMap();        m1.showMap();    }}test();//-----------------