一个JavaScript面试题，求大佬解答。

Question

本人很菜，感觉大佬们的解答。

Answer 1

笨比方法

var arr = [
    {product:'pd1',price: 100,profit:50,quantity: 10},
    {product:'pd2',price: 110,profit:10,quantity: 1000},
    {product:'pd3',price: 120,profit:30,quantity: 10},
    {product:'pd4',price: 110,profit:20,quantity: 10},
    {product:'pd5',price: 120,profit:70,quantity: 10},
    {product:'pd6',price: 130,profit:90,quantity: 10},
]

var foo = (arr) => {
    var sortArr = arr.sort((a,b)=>b.profit*b.quantity - a.profit*a.quantity)
    var result = {
        product: [],
        price: [],
        profit: [],
        quantity: [],
    }
    sortArr.forEach(item=>{
        result.product.push(item.product)
        result.price.push(item.price)
        result.profit.push(item.profit)
        result.quantity.push(item.quantity)
    })
    return result
}
var result = foo(arr)
console.log(result)

Answer 2

const skus = ['profit', 'product', 'price', 'quantity'];
const convert = arr => arr.sort(a.profit*a.quantity - b.profit*b.quantity).
    reduce((pre, cur) => (skus.forEach(sku => pre[sku].push(cur[sku])), pre), 
    skus.reduce((pre, cur) => ((pre[cur] = []), pre), {}));

应该能秀死面试官。

Answer 3

哈哈哈 在线等的那种么 ≡ω≡