How does one parse an object with points (.) included in the keys to an multi leveled object?

Question

Example:

{
    "data.firstName": "John",
    "data.lastName": "Doe",
    "data.email": "example@example.org"
}

Expected result:

{
    data: {
        firstName: "John",
        lastName: "Doe",
        email: "example@example.org"
    }
}

PS: You can find collections like this in MongoDB's find query, but I couldn't find how the do it, hence the question.

@JimmyKnoot JavaScript arrays don't use `:` as delimiters between indices. That's object syntac — Sterling Archer, Nov 03 '14 at 15:44
I see, it's already an object by making it associative, my bad. Edited. — Jimmy Knoot, Nov 03 '14 at 15:48
Where are you stuck? What have you tried? Have you at least started with a loop? — , Nov 03 '14 at 15:49
This question has already been asked multiple times in multiple forms. Please search. You'll find things like http://stackoverflow.com/questions/6393943/convert-javascript-string-in-dot-notation-into-an-object-reference, or http://stackoverflow.com/questions/10934664/convert-string-in-dot-notation-to-get-the-object-reference, and http://stackoverflow.com/questions/6491463/accessing-nested-javascript-objects-with-string-key. — , Nov 03 '14 at 16:27

frajk · Accepted Answer · 2014-11-03T18:45:53.570

1

You could do something like:

var data = {
    "data.firstName": "John",
    "data.lastName": "Doe",
    "data.email": "example@example.org"
}

var result = {};  

Object.keys(data).forEach(function (key) {
  var value = data[key]; 
  var keyParent = key.split(".")[0]; 
  var keyChild = key.split(".")[1]; 

  if(!result[keyParent]){
    result[keyParent] = {};
  }

  result[keyParent][keyChild] = value;

});

And the result object would be like the results you are looking for.

edited Nov 03 '14 at 18:45

answered Nov 03 '14 at 16:14

frajk

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For extra credit, extend your answer to handle multi-part paths. In any case, I doubt if your solution will work if there are keys with different first parts. In that case, your `inner` variable will be polluted with the previous entry. – Nov 03 '14 at 16:49
thanks for pointing that out @torazaburo , was only considering data that op posted. fixed for keys with different first parts. have to think a minute about how to handle multi-part paths – frajk Nov 03 '14 at 18:47
You should check if the length of the split is 2 before executing the routine of the child key. – gaelgillard Nov 03 '14 at 19:00

How does one parse an object with points (.) included in the keys to an multi leveled object?

1 Answers1