解决数组处理问题？

Question

 let keys = ['a', 'b'] let vals = [    [111, 222],    [333, 444] ]期望结果：  [{a:111,b:222},{a:333,b:444}]

Answer 1

let result = vals.map(val => keys.reduce((obj, key, i) => [obj[key] = val[i], obj][1], {}))

Answer 2

reduce计数器使用不熟，只好用foreach了

let arr = []

keys.forEach((item, index) => {

    arr[index] = {}

    vals.forEach((k, j) => arr[index][keys[j]] = vals[index][j])

})