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2 |
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3 |
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4 | export default function memoize3(fn) {
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5 | var cache0;
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6 |
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7 | function memoized(a1, a2, a3) {
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8 | if (!cache0) {
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9 | cache0 = new WeakMap();
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10 | }
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11 |
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12 | var cache1 = cache0.get(a1);
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13 | var cache2;
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14 |
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15 | if (cache1) {
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16 | cache2 = cache1.get(a2);
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17 |
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18 | if (cache2) {
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19 | var cachedValue = cache2.get(a3);
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20 |
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21 | if (cachedValue !== undefined) {
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22 | return cachedValue;
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23 | }
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24 | }
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25 | } else {
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26 | cache1 = new WeakMap();
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27 | cache0.set(a1, cache1);
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28 | }
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29 |
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30 | if (!cache2) {
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31 | cache2 = new WeakMap();
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32 | cache1.set(a2, cache2);
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33 | }
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34 |
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35 | var newValue = fn(a1, a2, a3);
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36 | cache2.set(a3, newValue);
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37 | return newValue;
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38 | }
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39 |
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40 | return memoized;
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41 | }
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