58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = iterator;
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var _isArrayLike = require('lodash/isArrayLike');
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var _isArrayLike2 = _interopRequireDefault(_isArrayLike);
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var _getIterator = require('./getIterator');
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var _getIterator2 = _interopRequireDefault(_getIterator);
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var _keys = require('lodash/keys');
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var _keys2 = _interopRequireDefault(_keys);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function createArrayIterator(coll) {
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var i = -1;
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var len = coll.length;
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return function next() {
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return ++i < len ? { value: coll[i], key: i } : null;
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};
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}
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function createES2015Iterator(iterator) {
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var i = -1;
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return function next() {
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var item = iterator.next();
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if (item.done) return null;
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i++;
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return { value: item.value, key: i };
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};
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}
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function createObjectIterator(obj) {
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var okeys = (0, _keys2.default)(obj);
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var i = -1;
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var len = okeys.length;
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return function next() {
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var key = okeys[++i];
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return i < len ? { value: obj[key], key: key } : null;
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};
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}
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function iterator(coll) {
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if ((0, _isArrayLike2.default)(coll)) {
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return createArrayIterator(coll);
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}
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var iterator = (0, _getIterator2.default)(coll);
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return iterator ? createES2015Iterator(iterator) : createObjectIterator(coll);
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}
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module.exports = exports['default'];
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