lodash/_hasPath.js

import baseCastPath from './_baseCastPath';
import isArguments from './isArguments';
import isArray from './isArray';
import isIndex from './_isIndex';
import isKey from './_isKey';
import isLength from './isLength';
import isString from './isString';

/**
 * 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) {
  path = isKey(path, object) ? [path] : baseCastPath(path);

  var result,
      index = -1,
      length = path.length;

  while (++index < length) {
    var key = path[index];
    if (!(result = object != null && hasFunc(object, key))) {
      break;
    }
    object = object[key];
  }
  if (result) {
    return result;
  }
  var length = object ? object.length : 0;
  return !!length && isLength(length) && isIndex(key, length) &&
    (isArray(object) || isString(object) || isArguments(object));
}

export default hasPath;