12345678910111213141516171819202122232425262728293031323334353637383940 |
- var castPath = require('./_castPath'),
- isArguments = require('./isArguments'),
- isArray = require('./isArray'),
- isIndex = require('./_isIndex'),
- isLength = require('./isLength'),
- toKey = require('./_toKey');
- /**
- * 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 = castPath(path, object);
- var index = -1,
- length = path.length,
- result = false;
- while (++index < length) {
- var key = toKey(path[index]);
- if (!(result = object != null && hasFunc(object, key))) {
- break;
- }
- object = object[key];
- }
- if (result || ++index != length) {
- return result;
- }
- length = object == null ? 0 : object.length;
- return !!length && isLength(length) && isIndex(key, length) &&
- (isArray(object) || isArguments(object));
- }
- module.exports = hasPath;
|