How find properties in an array in object and move these objects to another array in the object?

Question

How find properties in an array in object and move these objects to another array in the object? How to extract {"comment": "value"} from this.state.comments and place it in thecomment object in the comments array after other objects? I remapped the array and extracted the values themselves - comment properties. How to extract the whole object so it would look like this {"comment:" value "}

const comment = {
        "comments": [{'comment': 'aaa'}, {'comment': 'bbb'}]
        "description": " ytytyty"
        "id": 3
        "title": "gfgfgfgfgf"
    }

this.state.comments = [
    {"comment": "eeeee"},
    {"comment": "rrrrr"},
    {"comment": "ggggg"},
    {"date: Thu Jun 13 2019 01:27:09 
      "desc": "dfdfdf"
      "comment": "hhhhhh"
    }
]

let v = this.state.comments.map(t => t.comment? t.comment : t);

 console.log(`{comment: ${v}`);

Expected effect:

const comment = {
        "comments": [{'comment': 'aaa'}, {'comment': 'bbb'}, 
           {"comment": "eeeee"}, {"comment": "rrrrr"}, {"comment": 
           "ggggg"}, "comment": "hhhhhh"]
        "description": " ytytyty"
        "id": 3
        "title": "gfgfgfgfgf"
}

Answer 1

const comment = {
        "comments": [{'comment': 'aaa'}, {'comment': 'bbb'}],
        "description": " ytytyty",
        "id": 3,
        "title": "gfgfgfgfgf"
    }

let newComments = [
    {"comment": "eeeee"},
    {"comment": "rrrrr"},
    {"comment": "ggggg"},
    {"date": "Thu Jun 13 2019 01:27:09", 
      "desc": "dfdfdf",
      "comment": "hhhhhh"
    }
]

newComments.forEach(t => {
  if( t.comment ) comment.comments.push({
    comment: t.comment
  })
});

 console.log(comment);

Answer 2

const comment = {
        comments: [{comment: 'aaa'}, {comment: 'bbb'}],
        description: " ytytyty",
        id: 3,
        title: "gfgfgfgfgf"
    }

const newComments = [
    {comment: "eeeee"},
    {comment: "rrrrr"},
    {comment: "ggggg"},
    {date: "Thu Jun 13 2019 01:27:09", 
      desc: "dfdfdf",
      comment: "hhhhhh"
    }
];

comment.comments = newComments.reduce((res,obj) => obj.comment ? [...res, {comment : obj.comment}] : res,comment.comments || [])



 console.log(comment);

Answer 3

Just iterate through each item with forEach and check if the key is comment - if so, push to the comments array.

const comment = {"comments":[{'comment':'aaa'},{'comment':'bbb'}], "description":" ytytyty", "id":3, "title":"gfgfgfgfgf"};
const state = {comments:[{"comment":"eeeee"},{"comment":"rrrrr"},{"comment":"ggggg"},{"date":"Thu Jun 13 2019 01:27:09", "desc":"dfdfdf", "comment":"hhhhhh"}]};
state.comments.forEach(({ comment: c }) => c ? comment.comments.push({ c }) : c);
console.log(comment);

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