如何实现将arr和arr1对应索引里的对象合并 结果为arr2

Question

var arr=[{a:1,b:2},{a:2,b:3}]
var arr1 = [{c:1,d:2},{c:3,d:4}]


arr2=[{a:1,b:2,c:1,d:2},{a:2,b:3,c:3,d:4}]

Answer 1

arr.forEach((k,i) => {
    Object.assign(k,arr1[i]);
})

得到的arr就是arr2，arr1不变