lodash/internal/hasPath.js

var baseToPath = require('./baseToPath'),
    isArguments = require('../isArguments'),
    isArray = require('../isArray'),
    isIndex = require('./isIndex'),
    isKey = require('./isKey'),
    isLength = require('../isLength'),
    isString = require('../isString'),
    last = require('../last'),
    parent = require('./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)));
}

module.exports = hasPath;