lodash/_createBaseFor.js

/**
 * Creates a base function for methods like `_.forIn` and `_.forOwn`.
 *
 * @private
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {Function} Returns the new base function.
 */
function createBaseFor(fromRight) {
  return (object, iteratee, keysFunc) => {
    const iterable = Object(object);
    const props = keysFunc(object);

    let index = -1;
    let length = props.length;

    while (length--) {
      const key = props[fromRight ? length : ++index];
      if (iteratee(iterable[key], key, iterable) === false) {
        break;
      }
    }
    return object;
  };
}

export default createBaseFor;