Function baseSet

src/helpers/set.js:513–543

* The base implementation of `_.set`. * * @private * @param {Object} object The object to modify. * @param {Array|string} path The path of the property to set. * @param {*} value The value to set. * @param {Function} [customizer] The function to customize path creation. * @returns {Object} Re

(object, path, value, customizer)

 * @returns {Object} Returns `object`.
 */
function baseSet(object, path, value, customizer) {
  if (!isObject(object)) {
    return object;
  }
  path = isKey(path, object) ? [path] : castPath(path);

  var index = -1,
    length = path.length,
    lastIndex = length - 1,
    nested = object;

  while (nested != null && ++index < length) {
    var key = toKey(path[index]),
      newValue = value;

    if (index != lastIndex) {
      var objValue = nested[key];
      newValue = customizer ? customizer(objValue, key, nested) : undefined;
      if (newValue === undefined) {
        newValue = isObject(objValue)
          ? objValue
          : isIndex(path[index + 1])
          ? []
          : {};
      }
    }
    assignValue(nested, key, newValue);
    nested = nested[key];
  }
  return object;
}

/**
 * The base implementation of `_.toString` which doesn't convert nullish