lodash/propertyOf.js

define(['./_baseGet'], function(baseGet) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * The opposite of `_.property`; this method creates a function that returns
   * the value at a given path of `object`.
   *
   * @static
   * @memberOf _
   * @category Util
   * @param {Object} object The object to query.
   * @returns {Function} Returns the new function.
   * @example
   *
   * var array = [0, 1, 2],
   *     object = { 'a': array, 'b': array, 'c': array };
   *
   * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
   * // => [2, 0]
   *
   * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
   * // => [2, 0]
   */
  function propertyOf(object) {
    return function(path) {
      return object == null ? undefined : baseGet(object, path);
    };
  }

  return propertyOf;
});