木桶结构压缩数据

//通过木桶结构压缩数据,getMidNum获取中间数
class Tong {
    constructor(){
        this.data=[]
        this.length=0;
    }
    add(num){
        if(!this.data[num]){
            this.data[num]=1;
        }else{
            this.data[num]++;
        }
        this.length++;
    }
    del(num){
        if(this.data[num]){
            this.data[num]--;
            this.length--;
        }
    }
    //获取中间数
    getMidNum(){
        let midlen=this.length>>1;
        let m=this.length%2;

        let midNum;
        for(let i=0;i<this.data.length;i++){
            if(this.data[i]){
                if(midlen-this.data[i]+m>0){
                    midlen=midlen-this.data[i]
                }else{
                    midNum=i;
                    break;
                }
            }
        }

        return midNum;
    }
}

const t=new Tong()
for(let i=0;i<100000;i++){
    t.add(1)
    t.add(2)
    t.add(3)
    t.add(1)
}
console.log(t)
console.log(t.getMidNum())