lodash/internal/baseFor.js

import toObject from './toObject';

/**
 * The base implementation of `baseForIn` and `baseForOwn` which iterates
 * over `object` properties returned by `keysFunc` invoking `iteratee` for
 * each property. Iterator functions may exit iteration early by explicitly
 * returning `false`.
 *
 * @private
 * @param {Object} object The object to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @param {Function} keysFunc The function to get the keys of `object`.
 * @returns {Object} Returns `object`.
 */
function baseFor(object, iteratee, keysFunc) {
  var index = -1,
      iterable = toObject(object),
      props = keysFunc(object),
      length = props.length;

  while (++index < length) {
    var key = props[index];
    if (iteratee(iterable[key], key, iterable) === false) {
      break;
    }
  }
  return object;
}

export default baseFor;