How can i remove nested or parent object from array in javascript

Question

I want to remove object using its id, I don't want MongoDB query I just want to remove object using its id, array stored in the variable, we can use the javascript function aswell

Example
If I pass id=ObjectId("5b693e7ddd65ec16a46b7f82") from this object

 [{
     "commentedBy": "test",
     "subComments": {
         "commentedBy": "jaril 2",
         "subComments": {
             "commentedBy": "jaril 3",
             "subComments": {
                 "commentedBy": "jaril 4",
                 "commentId": ObjectId("5b693e7ddd65ec16a46b7f85")
             },
             "commentId": ObjectId("5b693e7ddd65ec16a46b7f84")
         },
         "commentId": ObjectId("5b693e7ddd65ec16a46b7f83")
     },
     "commentId": ObjectId("5b693e7ddd65ec16a46b7f82")
 }]

then output should like this

[]

or if i pass id=ObjectId("5b693e7ddd65ec16a46b7f83") then output should this

[{
    "commentedBy": "test",
    "commentId": ObjectId("5b693e7ddd65ec16a46b7f82")
}]

I use this recursive function for remove comments but it's not removing, because we need to pass key of it

async.eachSeries(result[0].comments, function (data, cb) {
    function deleteCommentId(comments) {
        if (comments.commentId.valueOf() == req.body.commentId) {
            delete comments
        }

        if (comments.subComments) {
            deleteCommentId(comments.subComments);
        }

        return comments;
    }

    deleteCommentId(data)
    return cb();
}, function () {
    console.log(JSON.stringify(resultFind))
})

If I have 500 sub comments then we should we able to any of them with its id, any help would be appreciated.

You need to create a recursive function to achieve this. First in subcomment match the Object If if it is matched then delete the whole object. Otherwise search the child apply the same logic — Deepak Kumar
– Deepak Kumar, Commented Aug 7, 2018 at 9:29
@DeepakKumar I have created recursive function as well but problem is that, if they pass the very first parent id then it should remove from the array, I have already managed sub comment but not able to do with very first parent :( — Raj Jaril
– Raj Jaril, Commented Aug 7, 2018 at 9:32
ObjectId("5b693e7ddd65ec16a46b7f82") is a function call with parameter, right? — Tushar Shukla
– Tushar Shukla, Commented Aug 7, 2018 at 9:32

Abin Thaha Azees · Accepted Answer · 2018-08-07 09:53:26Z

1

Could you please check if this works well for your requirement?

function retComment(commentArray, id) {
    if (commentArray.commentId === id || !commentArray.subComments) {
        return [];
    } else if (commentArray.subComments && commentArray.subComments.commentId === id) {
        return {
            "commentedBy": commentArray.commentedBy,
            "commentId": commentArray.commentId
        }
    } else {
        retComment(commentArray.subComments, id)
    }
}

You need to make the initial call like retComment(commentArray[0], "5b693e7ddd65ec16a46b7f82")

edited Aug 7, 2018 at 9:53

answered Aug 7, 2018 at 9:47

Abin Thaha Azees

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3 Comments

Raj Jaril Over a year ago

thanks for your answer, I got your logic it may work but we can't return [] because array length is not only one, I just put only one object for your understanding, in the array we have to find from the entire array

Abin Thaha Azees Over a year ago

So what you want is, if there is no data, then you need to remove that object and just send you back the object with data. Isn't it?

Raj Jaril Over a year ago

Just check my array, objects is array[0], but there is so many comment object and inside it, there are many sub comments, we should able to any of them with id if it is first then it should only pull that comment object from array not other

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