For-if嵌套在for-if中

如何解决For-if嵌套在for-if中

//array

let posts = [{
    text: "First post!",id: "p1",comments: [{
        id: "c1",text: "First comment on first post!"
      },{
        id: "c2",text: "Second comment on first post!!"
      },{
        id: "c3",text: "Third comment on first post!!!"
      }
    ]
  },{
    text: "Aw man,I wanted to be first",id: "p2",comments: [{
        id: "c4",text: "Don't wory second poster,you'll be first one day."
      },{
        id: "c5",text: "Yeah,believe in yourself!"
      },{
        id: "c6",text: "Haha second place what a joke."
      }
    ]
  }
]


//loops
const removeComment = function(postId,commentID) {

  for (let post in posts) {
    if (posts[post].id == postId) {

      for (let Comment of posts.comments) {

        if (posts.comments[comment].id == commentID) {

          comment.splice(comment,1)
        }
      }

    }
  }


}

//invoking the function

tweeter.removeComment("p2","c6")

我正在尝试在特定帖子（即“ p2”）中发表评论（即“ c6”），并将其从数组中删除。

为了遍历Comment对象，我在for-if中嵌套了for。 我没有收到任何错误，但是第一个for-if工作正常。 谢谢

解决方法

您需要更改一些功能。您正在使用let post in posts，它可以循环显示数字，因此当您尝试作为对象访问逻辑时，逻辑将关闭。

let Comment of posts.comments

您希望通过匹配的postId遍历特定注释。

您正在使用未定义的comment。检查以下代码段，运行并根据需要进行编辑。

let posts = [{
    text: "First post!",id: "p1",comments: [{
        id: "c1",text: "First comment on first post!"
      },{
        id: "c2",text: "Second comment on first post!!"
      },{
        id: "c3",text: "Third comment on first post!!!"
      }
    ]
  },{
    text: "Aw man,I wanted to be first",id: "p2",comments: [{
        id: "c4",text: "Don't wory second poster,you'll be first one day."
      },{
        id: "c5",text: "Yeah,believe in yourself!"
      },{
        id: "c6",text: "Haha second place what a joke."
      }
    ]
  }
]


//loops
const removeComment = (postId,commentID)=> {
  for (let post of posts) {
    if (post['id'] == postId) {
      for (let Comment of post.comments) {
        if (Comment['id'] == commentID) {
          post.comments.splice(post.comments.indexOf(Comment),1);
        }
      }
    }
  }
}
removeComment("p2","c6");
console.log(posts);