1'use strict';
2
3Object.defineProperty(exports, "__esModule", {
4    value: true
5});
6exports.default = createIterator;
7
8var _isArrayLike = require('./isArrayLike.js');
9
10var _isArrayLike2 = _interopRequireDefault(_isArrayLike);
11
12var _getIterator = require('./getIterator.js');
13
14var _getIterator2 = _interopRequireDefault(_getIterator);
15
16function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
17
18function createArrayIterator(coll) {
19    var i = -1;
20    var len = coll.length;
21    return function next() {
22        return ++i < len ? { value: coll[i], key: i } : null;
23    };
24}
25
26function createES2015Iterator(iterator) {
27    var i = -1;
28    return function next() {
29        var item = iterator.next();
30        if (item.done) return null;
31        i++;
32        return { value: item.value, key: i };
33    };
34}
35
36function createObjectIterator(obj) {
37    var okeys = obj ? Object.keys(obj) : [];
38    var i = -1;
39    var len = okeys.length;
40    return function next() {
41        var key = okeys[++i];
42        if (key === '__proto__') {
43            return next();
44        }
45        return i < len ? { value: obj[key], key } : null;
46    };
47}
48
49function createIterator(coll) {
50    if ((0, _isArrayLike2.default)(coll)) {
51        return createArrayIterator(coll);
52    }
53
54    var iterator = (0, _getIterator2.default)(coll);
55    return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll);
56}
57module.exports = exports['default'];