index.js
function internalSetPathValue(obj, val, parsed) {
  var tempObj = obj;
  var pathDepth = parsed.length;
  var part = null;
  // Here we iterate through every part of the path
  for (var i = 0; i < pathDepth; i++) {
    var propName = null;
    var propVal = null;
    part = parsed[i];

    // If it's the last part of the path, we set the 'propName' value with the property name
    if (i === (pathDepth - 1)) {
      propName = typeof part.p === 'undefined' ? part.i : part.p;
      // Now we set the property with the name held by 'propName' on object with the desired val
      tempObj[propName] = val;
    } else if (typeof part.p !== 'undefined' && tempObj[part.p]) {
      tempObj = tempObj[part.p];
    } else if (typeof part.i !== 'undefined' && tempObj[part.i]) {
      tempObj = tempObj[part.i];
    } else {
      // If the obj doesn't have the property we create one with that name to define it
      var next = parsed[i + 1];
      // Here we set the name of the property which will be defined
      propName = typeof part.p === 'undefined' ? part.i : part.p;
      // Here we decide if this property will be an array or a new object
      propVal = typeof next.p === 'undefined' ? [] : {};
      tempObj[propName] = propVal;
      tempObj = tempObj[propName];
    }
  }
}
function internalSetPathValue(obj, val, parsed) {
  var tempObj = obj;
  var pathDepth = parsed.length;
  var part = null;
  // Here we iterate through every part of the path
  for (var i = 0; i < pathDepth; i++) {
    var propName = null;
    var propVal = null;
    part = parsed[i];

    // If it's the last part of the path, we set the 'propName' value with the property name
    if (i === (pathDepth - 1)) {
      propName = typeof part.p === 'undefined' ? part.i : part.p;
      // Now we set the property with the name held by 'propName' on object with the desired val
      tempObj[propName] = val;
    } else if (typeof part.p !== 'undefined' && tempObj[part.p]) {
      tempObj = tempObj[part.p];
    } else if (typeof part.i !== 'undefined' && tempObj[part.i]) {
      tempObj = tempObj[part.i];
    } else {
      // If the obj doesn't have the property we create one with that name to define it
      var next = parsed[i + 1];
      // Here we set the name of the property which will be defined
      propName = typeof part.p === 'undefined' ? part.i : part.p;
      // Here we decide if this property will be an array or a new object
      propVal = typeof next.p === 'undefined' ? [] : {};
      tempObj[propName] = propVal;
      tempObj = tempObj[propName];
    }
  }
}
/* !
## internalSetPathValue(obj, value, parsed)

Companion function for `parsePath` that sets
the value located at a parsed address.

internalSetPathValue(obj, 'value', parsed);

@param {Object} object to search and define on
@param {*} value to use upon set
@param {Object} parsed definition from `parsePath`
@api private