js数组操作

Question

let arr1 = ['a','b','c'];
let arr2 = ['d','e','f'];

怎么才能变成

let arr3 = [{'key1':'a','key2':'d'},{'key1':'b','key2':'e'},{'key1':'c','key2':'f'}];

Answer 1

let arr3 = arr1.map((item,index)=>({
    key1:item,
    key2:arr2[index] || ''
}))

Answer 2

var arr1 = ['a','b','c'];
var arr2 = ['d','e','f'];
let arr3 = arr1.map(function(val,index)=>{
    return {'key1':val,'key2':arr2[index]};
});

Answer 3

数据结构长度永远一样吗？
为了容错处理，建议事先对比一下 两个数组的长度，然后循环 长度大的数组，避免丢失数据.