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1 | /**
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2 | * @license
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3 | * Copyright Google LLC All Rights Reserved.
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4 | *
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5 | * Use of this source code is governed by an MIT-style license that can be
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6 | * found in the LICENSE file at https://angular.io/license
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7 | */
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8 | import { global as _global } from './global';
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9 | let _symbolIterator = null;
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10 | export function getSymbolIterator() {
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11 | if (!_symbolIterator) {
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12 | const Symbol = _global['Symbol'];
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13 | if (Symbol && Symbol.iterator) {
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14 | _symbolIterator = Symbol.iterator;
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15 | }
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16 | else {
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17 | // es6-shim specific logic
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18 | const keys = Object.getOwnPropertyNames(Map.prototype);
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19 | for (let i = 0; i < keys.length; ++i) {
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20 | const key = keys[i];
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21 | if (key !== 'entries' && key !== 'size' &&
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22 | Map.prototype[key] === Map.prototype['entries']) {
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23 | _symbolIterator = key;
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24 | }
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25 | }
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26 | }
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27 | }
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28 | return _symbolIterator;
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29 | }
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30 | //# sourceMappingURL=data:application/json;base64,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 |
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