js数组操作

Question

let arr = [
{age:18,name:a}
{age:13,name:b}
{age:18,name:c}
{age:4,name:e}
]
遍历arr数组，如果age是18，把当前这个数据name字段加入当前数据后面
最后结果是这样：

let arr = [
{age:18,name:a}
{name:a}
{age:13,name:b}
{age:18,name:c}
{name:c}
{age:4,name:e}
]

Answer 1

arr.reduce((res, item) => {
    res.push(item)
    item.age == 18 && res.push({name: item.name})
    return res
}, [])

Answer 2

提问之前麻烦自己先检查一下自己提出的问题

Answer 3

var arr5 = [
  {age:18,name:'a'},
  {age:13,name:'b'},
  {age:18,name:'c'},
  {age:4,name:'e'},
]
for(let i = 0;i<arr5.length;i++){
  if(arr5[i].age == 18){
    let obj = {name:arr5[i].name}
    arr5.splice(i+1,0,obj)
  }
}
console.log('这是什么？',arr5)