let books = [ { id: 100, name: ‘红楼梦‘, price: 100 }, { id: 101, name: ‘西游记‘, price: 150 }, { id: 102, name: ‘三国‘, price: 160 } ] let res=books.reduce((prev,next)=>next.price+prev,0)
js reduce
原文：https://www.cnblogs.com/xiaoliziaaa/p/13509123.html
