src/lib/helpers/Object.js

/**
 * Switches keys and values in an object. E.G.: { "a": 1 } becomes { 1: "a" }.
 * @param {Object} obj The object to reverse.
 * @return {Object} The reversed object.
 */
export function reverse(obj) {
  return Object.keys(obj).reduce(
    (result, key) =>
      Object.assign(result, {
        [obj[key]]: key,
      }),
    {}
  );
}

/**
 * Picks some properties from an object and returns a new object containing these.
 * @param {Object} obj The object to pick from.
 * @param {Array<string>} properties Names of the properties to pick.
 * @return {Object} The resulting object.
 */
export function pick(obj, properties) {
  return properties.reduce((props, key) => Object.assign(props, { [key]: obj[key] }), {});
}