道具概率生成

/**生成道具
     * [getProbability description]
     * @return {[type]} [description]
     * 30,   //道具生成几率30%
     * 50,   //速度几率50%
     * 20,   //力量几率20%
     * 30,   //分裂几率30%
    */
    getProbability(){
        var one = [];
        do{
            var newRandom = Math.floor( Math.random() * 100);
            if (one.indexOf(newRandom) < 0) {
                one.push(newRandom);
            }
        }while(one.length < 30*1);
        console.log(one)

        var two = Math.floor( Math.random() * 100);
        if(one.indexOf(two) > 0){
            var aCompared = [];
            do{
                var newRandom = Math.floor( Math.random() * 100);
                if (aCompared.indexOf(newRandom) < 0) {
                    aCompared.push(newRandom);
                }
            }while(aCompared.length < 20*1);
            console.log(aCompared)

            var bCompared = [];
            do{
                var newRandomnewRandom = Math.floor( Math.random() * 100);
                if (aCompared.indexOf(newRandomnewRandom) < 0 && bCompared.indexOf(newRandomnewRandom) < 0) {
                    bCompared.push(newRandomnewRandom);
                }
            }while(bCompared.length < 30*1)
            console.log(bCompared)

            var cCompared = [];
            do{
                var newRandom = Math.floor( Math.random() * 100);
                if (aCompared.indexOf(newRandom) < 0 && bCompared.indexOf(newRandom) < 0 && cCompared.indexOf(newRandom) < 0) {
                    cCompared.push(newRandom);
                }
            }while(cCompared.length < 50*1)
            console.log(cCompared)

            var randomNum = Math.floor( Math.random() * 100);  
            if (aCompared.indexOf(randomNum) > 0) {
                return randomNum;
            }else if (bCompared.indexOf(randomNum) > 0) {
                return randomNum;
            }else if (cCompared.indexOf(randomNum) > 0) {
                return randomNum;
            }
        }
    },