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
}, [])