[JavaScript] 物件導向-類別宣告

// 宣告類別
function Attack(key) {
/*=( 建構子及初始化成員變數 )================== */
    // 設定字符表
    this.keyStr = key;
    
    // 將字串切割成陣列
    this.keyArray = this.keyStr.match(/./gi);
    
    // 進位基底
    this.base = this.keyArray.length;
    
    this.passwd = [0];


/*=( 成員函數 )================== */
    // 前進一個字符    
    this.pushPasswd = function(){
        var p = this.passwd;    
        var b = this.base;    
        var i = 0;
        
        p[i]++;
        while(p[i] >= b){
            p[i++] = 0;
            if(p[i] != undefined){
                p[i]++;
            }else{
                p[i] = 0;
            }
            
        }        
        return this;        
    };
    
    // 設定初始字串
    this.setPasswd = function(str){
        this.passwd = [0];

        if(str){
            var s = str.match(/./gi);
            var k = this.keyStr;
            
            for(var i=0,l=s.length; i<l; i++){
                num = k.indexOf( str[i] );
                if(num<0){ num = 0; }
                this.passwd[l-i-1] = num;
            }
        }
        return this;
    };
    
    // 取得當前字串
    this.getPasswd = function(){
        var temp = '';
        var k = this.keyArray;
        var p = this.passwd;
        
        for(var i=0,l=p.length; i<l; i++){
            temp = k[ p[i] ] + temp;
        }
        return temp;                
        
    };
}


// 建立物件
var try1 = new Attack('abcdefghijklmnopqrstuvwxyz0123456789');

// 物件操作
try1.setPasswd('asdf');
try1.getPasswd();