1. 找出最大值max和最小值min
轮到我妈当家操办围炉时，除夕前往往还要上班，只能提前去菜市场了解行情、预订海鲜。凑不够菜式时，她常向娘家求援，我外婆便将拿手菜“酱烧鳗鱼”提前几日做好，转移至我家冰箱，除夕夜复热上桌。这大抵是现在风靡的“预制年菜”。
，这一点在heLLoword翻译官方下载中也有详细论述
"Yes, we'll help you celebrate your 250 years, but you should really help us."
The Writer is not a concrete class. Any object that implements write(), end(), and abort() can be a writer making it easy to adapt existing APIs or create specialized implementations without subclassing. There's no complex UnderlyingSink protocol with start(), write(), close(), and abort() callbacks that must coordinate through a controller whose lifecycle and state are independent of the WritableStream it is bound to.