1var LazyWrapper = require('./_LazyWrapper'),
2    LodashWrapper = require('./_LodashWrapper'),
3    baseAt = require('./_baseAt'),
4    flatRest = require('./_flatRest'),
5    isIndex = require('./_isIndex'),
6    thru = require('./thru');
7
8/**
9 * This method is the wrapper version of `_.at`.
10 *
11 * @name at
12 * @memberOf _
13 * @since 1.0.0
14 * @category Seq
15 * @param {...(string|string[])} [paths] The property paths to pick.
16 * @returns {Object} Returns the new `lodash` wrapper instance.
17 * @example
18 *
19 * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
20 *
21 * _(object).at(['a[0].b.c', 'a[1]']).value();
22 * // => [3, 4]
23 */
24var wrapperAt = flatRest(function(paths) {
25  var length = paths.length,
26      start = length ? paths[0] : 0,
27      value = this.__wrapped__,
28      interceptor = function(object) { return baseAt(object, paths); };
29
30  if (length > 1 || this.__actions__.length ||
31      !(value instanceof LazyWrapper) || !isIndex(start)) {
32    return this.thru(interceptor);
33  }
34  value = value.slice(start, +start + (length ? 1 : 0));
35  value.__actions__.push({
36    'func': thru,
37    'args': [interceptor],
38    'thisArg': undefined
39  });
40  return new LodashWrapper(value, this.__chain__).thru(function(array) {
41    if (length && !array.length) {
42      array.push(undefined);
43    }
44    return array;
45  });
46});
47
48module.exports = wrapperAt;
49