Answer 1

arr.toString().split(",").sort((a,b)=>{ return a-b})

2个问题：1、字符串数组；2、没去重。修正：Array.from(new Set(arr.toString().split(",").map(Number))).sort((a,b)=>{ return a-b})

Answer 2

function LazyMan(name) {
    if (!(this instanceof LazyMan)) {
        return new LazyMan(name);
    }
    this.name = name;
    this.delayTime = 0;
    this.tasks = [];
    console.log(`Hi I am ${this.name}`);
    this._ready();
}

LazyMan.prototype._ready = function () {
    setTimeout(() => {
        setTimeout(() => {
            console.log(`等待了${this.delayTime}秒...`);
            this._doTasks();
        }, this.delayTime * 1000);
    }, 0);
}

LazyMan.prototype._doTasks = function () {
    const tasks = this.tasks;
    if (tasks.length === 0) return;
    const {delayTime, callback} = tasks[0];
    setTimeout(() => {
        callback && callback();
        tasks.shift();
        this._doTasks();
    }, delayTime);
}

LazyMan.prototype.eat = function (foods) {
    this.tasks.push({
        delayTime: 0,
        callback() {
            console.log(`I am eating ${foods}`);
        },
    });
    return this;
}

LazyMan.prototype.sleep = function (seconds) {
    if (seconds >= 0) {
        this.tasks.push({
            delayTime: seconds * 1000,
            callback() {
                console.log(`等待了${seconds}秒...`)
            }
        });
    }
    return this;
}

LazyMan.prototype.sleepFirst = function (seconds) {
    if (seconds > 0) {
        this.delayTime = seconds;
    }
    return this;
}