lodash/internal/createForIn.js

import bindCallback from './bindCallback';
import keysIn from '../object/keysIn';

/**
 * Creates a function for `_.forIn` or `_.forInRight`.
 *
 * @private
 * @param {Function} objectFunc The function to iterate over an object.
 * @returns {Function} Returns the new each function.
 */
function createForIn(objectFunc) {
  return function(object, iteratee, thisArg) {
    if (typeof iteratee != 'function' || thisArg !== undefined) {
      iteratee = bindCallback(iteratee, thisArg, 3);
    }
    return objectFunc(object, iteratee, keysIn);
  };
}

export default createForIn;