/**
 * Get the value of an item inside an object
 * @param obj The source object
 * @param path The path to the object
 * @param defaultValue A default value to be returned
 *
 * @example
 *  U.get({ a: 1, b: 2 }, 'b') // => 2
 */
export function get(obj: object, path: string, defaultValue: unknown = undefined): unknown {
  const travel = (regexp: RegExp) => {
    return String.prototype.split
      .call(path, regexp)
      .filter(Boolean)
      .reduce((res, key) => {
        if (res !== null && res !== undefined && res.hasOwnProperty(key)) {
          const { value }: any = Object.getOwnPropertyDescriptor(res, key);

          return value;
        } else
          return res;

      }, obj);
  };
  const result = travel(/[,[\].]+?/);

  return result === undefined || result === obj ? defaultValue : result;
}