Javascript - Parsing INI file to nested associative array

Question

I am new to Javascript and am having trouble parsing a file with INI formatting into nested objects.

The file that I have is formatted as follows:

ford.car.focus.transmission=standard
ford.car.focus.engine=four-cylinder
ford.car.focus.fuel=gas

ford.car.taurus.transmission=automatic
ford.car.taurus.engine=V-8
ford.car.taurus.fuel=diesel

purchased=Ford Taurus

I would like the structure to look like this:

{ ford:
  { car:
    { focus:
      {
        transmission: 'standard',
        engine: 'four-cylinder',
        fuel: 'gas'
      }
    }
    { taurus:
      {
        transmission: 'automatic',
        engine: 'V-8',
        fuel: 'diesel'
      }
    }
  }
  purchased: 'Ford Taurus'
}

I store the file in lines in an array, splitting into '\ n'. I am trying to write a method that will be called in a loop, passing my global object as follows:

var hash = {};
var array = fileData.toString().split("\n");
for (i in array) {
  var tmp = array[i].split("=");
  createNestedObjects(tmp[0], tmp[1], hash);
}

This should allow me to access the values ​​in the hash object, for example:

hash.ford.car.focus.fuel
# 'gas'

hash.purchase
# 'Ford Taurus'

I tried something like what was suggested here: Javascript: how to dynamically create nested objects using the object names given by the array , but this only seems to set the last element in the socket.

{ fuel: 'diesel',
  purchased: 'Ford Taurus' }

My unsuccessful attempt looks like this:

createNestedObjects(path, value, obj) {
  var keys = path.split('.');
  keys.reduce(function(o, k) {
    if (k == keys[keys.length-1]) {
      return o[k] = value;
    } else {
      return o[k] = {};
    }
  }, obj);
}

:

{ ford: { car: { taurus: { fuel: 'diesel' } } },
  purchased: 'Ford Taurus' }

Answer 1

, .

createNestedObjects(path, value, obj) {
  var keys = path.split('.');
  keys.reduce(function(o, k) {
    if (k == keys[keys.length-1]) {
      return o[k] = value;
    } else if (o[k]) {
      return o[k];
    } else {
      return o[k] = {};
    }
  }, obj);
}