map循环嵌套，总是取得外层数组的最后一个值

Question

有两组数组arr01和arr02现在下把arr01数组中的某个字段添加到arr02中，现在问题是最后得到的新数组总是arr01的最后一个字段letarr01=[{"account":"000000000000"},{"account":"111111111111"},{"account":"2222222222222"}];letarr02=[{"city":"北京"},{"city":"上海"},{"city":"广东"}];letnewArr=[];arr01.map((cur01,eq)=>{arr01.map((cur02,index)=>{cur02.account=cur01.account;returnnewArr.push(cur);})})最后结果:newArr=[{"account":"2222222222222","city":"北京"},{"account":"2222222222222","city":"上海"},{"account":"2222222222222","city":"广东"},{"account":"2222222222222","city":"北京"},{"account":"2222222222222","city":"上海"},{"account":"2222222222222","city":"广东"},{"account":"2222222222222","city":"北京"},{"account":"2222222222222","city":"上海"},{"account":"2222222222222","city":"广东"}];我想得到的结果是:newArr=[{"account":"000000000000","city":"北京"},{"account":"000000000000","city":"上海"},{"account":"000000000000","city":"广东"},{"account":"111111111111","city":"北京"},{"account":"111111111111","city":"上海"},{"account":"111111111111","city":"广东"},{"account":"2222222222222","city":"北京"},{"account":"2222222222222","city":"上海"},{"account":"2222222222222","city":"广东"}];

Answer 1

你改变的是对象的引用地址所有最后改变的影响前面push进去的了
varnewArr=[];
arr01.forEach(v1=>{
arr02.forEach(v2=>{
newArr.push(Object.assign({},v2,{
account:v1.account
}))
})
})
console.log(newArr)