如何给数组添加一项值

Question

let arr = [
    {a:1,b:2,....,y:3},
    {a:2,b:2,....,y:3},
    {a:4,b:2,....,y:3},
];
let val = [1,2,....,2]

arr里面的记录拥有非常多的key-value这样的键值对。

val是新的一组值。

如何在arr里新增一条记录，key值同arr的记录，value是val数组的值？

Answer 1

let arr = [
  {a:1,b:2,y:3},
  {a:2,b:2,y:3},
  {a:4,b:2,y:3},
];
let val = [1,2,3];
let charCode = 97;
const obj = {a: val[0]};
const res = val.reduce((pre, el) => {
  charCode++;
  const key = String.fromCharCode(charCode);
  obj[key] = el;
  return obj;
});
arr.push(res);
console.log(arr);

Answer 2

  let arr=[
    {a:1,b:2,c:3,y:4},
    {a:2,b:3,c:4,y:5},
  ]
  let val=[3,4,5,6];
  let keys=Object.keys(arr[0]);
  let newValue={};
  keys.forEach((key,index)=>{
    newValue[key]=val[index];
  })
  arr.push(newValue)
  console.log(arr)