How to get and to update nested object values with the dot notation string using javascript

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Inaam Husain Staff asked 3 years ago

Can anyone have a better solution to get and update nested object values with the dot notation string using javascript? I have an object say,

let user = {
  "fullname": {
    "firstname": "abc"
    "lastname": "xyz"
  }
};

and I have a string with the dot notation which indicates what key needs to get or updated like “user.fullname.firstname” to “John Doe” for the updation. and the end output should be something like this,

{
  "fullname": {
    "firstname": "John Doe"
    "lastname": "xyz"
  }
}
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1 Answers
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Rehmaanali Staff answered 3 years ago

You can use this approach via
passing the data as an internal object, filed to be updated, and value of the field.

nestedObjectGetUpdate(data, field, value) {
  let schema = data; // a moving reference to internal objects within obj
  const pList = field.split('.');
  const len = pList.length;
  for (var i = 0; i < len - 1; i++) {
    var elem = pList[i];
    if (!schema[elem]) schema[elem] = {}
    schema = schema[elem];
  }
  if (!value) {
    return schema[pList[len - 1]];
  }
  schema[pList[len - 1]] = value;
}
Inaam Husain Staff replied 3 years ago

Awesome. Working as expected.

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