Question

我希望能够分配一个名为likeTotalForComment的新嵌套属性，如下所示：

{
     comment: [
          {
               likeTotalForComment:
          }
     ]
}

这是我目前写的：

commentLikes = data.map(
                    (v,i) => {

                  return(  v.comment.map(
                            (c, ci) => {
                              newValue = sumFunc(data[i].comment[ci].like, 'value')
                              return data[i].comment[ci] = {likeTotalForComment: newValue}
                            }
                        )

                      )
                    }
                )

console.log(commentLikes)

退货给了我

[[{likeTotalForComment: 2}, {likeTotalForComment: 4}]]

不是整个对象都具有新的嵌套属性，这正是我想要的

以下是一些示例数据：https://codepen.io/schoenbl/pen/gVgJLm?editors=0010

Answer 1

使用Object.spread将新属性合并到旧对象

data = data.map(v => {
  return {...v, comment: v.comment.map(c => {
    let newValue = sumFunc(c.like, 'value');
    return { ...c, likeTotalForComment: newValue };
  })}
});

或只是将新属性分配给旧对象

data.forEach(v => {
  data.comment.forEach((comment) => {
    let newValue = sumFunc(c.like, 'value');
    comment['likeTotalForComment'] = newValue
  });
})

通过嵌套地图添加了嵌套对象属性

1 个答案: