[手写代码] 一个 LazyMan 是怎么养成的？ about blog HOT 2 OPEN

class _LazyMan {
  constructor (name) {
    this.taskQueue = [];
    this.runTimer = null;
    this.sayHi(name);
  }
 
  run () {
    if (this.runTimer) {
      clearTimeout(this.runTimer);
    }
 
    this.runTimer = setTimeout(async () => {
      for (let asyncFun of this.taskQueue) {
        await asyncFun()
      }
      this.taskQueue.length = 0;
      this.runTimer = null;
    })
    return this;
  }
 
  sayHi (name) {
    this.taskQueue.push(async () => console.log(`Hi, this is ${name}`));
    return this.run();
  }
 
  eat (food) {
    this.taskQueue.push(async () => console.log(`Eat ${food}`));
    return this.run();
  }
 
  sleep (second) {
    this.taskQueue.push(async () => {
      console.log(`Sleep ${second} s`)
      return this._timeout(second)
    });
    return this.run();
  }
 
  sleepFirst (second) {
    this.taskQueue.unshift(async () => {
      console.log(`Sleep first ${second} s`)
      return this._timeout(second);
    });
    return this.run();
  }
 
  async _timeout (second) {
    await new Promise(resolve => {
      setTimeout(resolve, second * 1e3);
    })
  }
}


var lazyMan = name => new _LazyMan(name)

lazyMan('fucker').sleep(4).eat(`you`)