Javascript how to use object key as an object path?

Question

First object is a map (with 1 element only for make it simple):

let dataMap = {
      Feed: "data",
    };

I need to assign those key values to separated path:

Object.keys(dataMap).forEach((value) => {
  struct[value] = Object.assign({}, struct[value], {
    "State": obj.Digital[dataMap[value]].State,
  });
});

console.log(struct);

Now the result looks something like this:

struct: { 
 Feed: { 
  State: "xy"
  } 
}

What I would like to do, is to change the Feed key to Feed.next. So it would look like:

struct: { 
     Feed: {
      next: {
       State: "xy"
       } 
      }
     }

Please note that struct.Feed does exist already from the beginning, so this is not created with the code above. My question is how should I write the dataMap object to achieve the structure above?

Is it like (it is not working):

let dataMap = {
          Feed[next]: "data",
        };

Thank you,

hmm, I mean, in the first solution inside the forEach method, struct[value] is equal to struct.Feed. What I would like to get is struct[value] equal to struct.Feed.next — It's a PARODY
– It's a PARODY, Commented Nov 6, 2017 at 10:37

ronIDX · Accepted Answer · 2017-11-06 10:49:49Z

1

Something like this:

var struct =  {Feed:{ State: "xy"}};

Add "next" property:

struct.Feed.next = {};

Create a copy of State in struct.Feed.next:

struct.Feed.next = JSON.parse(JSON.stringify(struct.Feed));

Delete fields:

delete struct.Feed.State
delete struct.Feed.next.next

Object now is:

struct {Feed: next{State: "xy"}}

edited Nov 6, 2017 at 10:49

answered Nov 6, 2017 at 10:43

ronIDX

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