1 | 'use strict';
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2 | var InternalStateModule = require('../internals/internal-state');
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3 | var createIteratorConstructor = require('../internals/iterator-create-constructor');
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4 | var createIterResultObject = require('../internals/create-iter-result-object');
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5 | var hasOwn = require('../internals/has-own-property');
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6 | var objectKeys = require('../internals/object-keys');
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7 | var toObject = require('../internals/to-object');
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8 |
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9 | var OBJECT_ITERATOR = 'Object Iterator';
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10 | var setInternalState = InternalStateModule.set;
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11 | var getInternalState = InternalStateModule.getterFor(OBJECT_ITERATOR);
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12 |
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13 | module.exports = createIteratorConstructor(function ObjectIterator(source, mode) {
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14 | var object = toObject(source);
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15 | setInternalState(this, {
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16 | type: OBJECT_ITERATOR,
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17 | mode: mode,
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18 | object: object,
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19 | keys: objectKeys(object),
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20 | index: 0
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21 | });
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22 | }, 'Object', function next() {
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23 | var state = getInternalState(this);
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24 | var keys = state.keys;
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25 | while (true) {
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26 | if (keys === null || state.index >= keys.length) {
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27 | state.object = state.keys = null;
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28 | return createIterResultObject(undefined, true);
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29 | }
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30 | var key = keys[state.index++];
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31 | var object = state.object;
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32 | if (!hasOwn(object, key)) continue;
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33 | switch (state.mode) {
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34 | case 'keys': return createIterResultObject(key, false);
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35 | case 'values': return createIterResultObject(object[key], false);
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36 | } return createIterResultObject([key, object[key]], false);
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37 | }
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38 | });
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