lazyMan

LazyMan=(name)=>{    // LazyMan('Frank').sleepFirst(5).eat('supper')
  var queue=[]
  const task=()=>{console.log(`你好,我是${name}`);next()}
  queue.push(task)
  const next=()=>{const first=queue.shift();first?.()}
  var api={
    _x:queue,
    sleep(n){
      const task=()=>{
        setTimeout(()=>{console.log(`我醒了,我刚睡了${n}秒`);next()},n*1000)
      }
      queue.push(task)
      return api
    },
    eat(type){
      const task=()=>{console.log(type==='lunch'?'吃午餐':'吃晚餐');next()}
      queue.push(task)
      return api
    },
    sleepFirst(n){
      const task=()=>{
        setTimeout(()=>{console.log(`我醒了,我刚睡了${n}秒`);next()},n*1000)
      }
      queue.unshift(task)
      return api
    }
  }
  setTimeout(()=>{next()})
  return api
}
LazyMan('Frank').sleepFirst(5).eat('supper')