lodash/internal/hasPath.js

define(['./baseToPath', '../isArguments', '../isArray', './isIndex', './isKey', '../isLength', '../isString', '../last', './parent'], function(baseToPath, isArguments, isArray, isIndex, isKey, isLength, isString, last, parent) {

  /**
   * Checks if `path` exists on `object`.
   *
   * @private
   * @param {Object} object The object to query.
   * @param {Array|string} path The path to check.
   * @param {Function} hasFunc The function to check properties.
   * @returns {boolean} Returns `true` if `path` exists, else `false`.
   */
  function hasPath(object, path, hasFunc) {
    if (object == null) {
      return false;
    }
    var result = hasFunc(object, path);
    if (!result && !isKey(path)) {
      path = baseToPath(path);
      object = parent(object, path);
      if (object != null) {
        path = last(path);
        result = hasFunc(object, path);
      }
    }
    return result || (isLength(object && object.length) && isIndex(path, object.length) &&
      (isArray(object) || isString(object) || isArguments(object)));
  }

  return hasPath;
});