1 | 'use strict';
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2 | var $ = require('../internals/export');
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3 | var addToUnscopables = require('../internals/add-to-unscopables');
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4 | var doesNotExceedSafeInteger = require('../internals/does-not-exceed-safe-integer');
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5 | var lengthOfArrayLike = require('../internals/length-of-array-like');
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6 | var toAbsoluteIndex = require('../internals/to-absolute-index');
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7 | var toIndexedObject = require('../internals/to-indexed-object');
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8 | var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
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9 |
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10 | var $Array = Array;
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11 | var max = Math.max;
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12 | var min = Math.min;
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13 |
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14 |
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15 |
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16 | $({ target: 'Array', proto: true }, {
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17 | toSpliced: function toSpliced(start, deleteCount /* , ...items */) {
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18 | var O = toIndexedObject(this);
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19 | var len = lengthOfArrayLike(O);
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20 | var actualStart = toAbsoluteIndex(start, len);
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21 | var argumentsLength = arguments.length;
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22 | var k = 0;
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23 | var insertCount, actualDeleteCount, newLen, A;
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24 | if (argumentsLength === 0) {
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25 | insertCount = actualDeleteCount = 0;
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26 | } else if (argumentsLength === 1) {
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27 | insertCount = 0;
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28 | actualDeleteCount = len - actualStart;
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29 | } else {
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30 | insertCount = argumentsLength - 2;
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31 | actualDeleteCount = min(max(toIntegerOrInfinity(deleteCount), 0), len - actualStart);
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32 | }
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33 | newLen = doesNotExceedSafeInteger(len + insertCount - actualDeleteCount);
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34 | A = $Array(newLen);
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35 |
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36 | for (; k < actualStart; k++) A[k] = O[k];
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37 | for (; k < actualStart + insertCount; k++) A[k] = arguments[k - actualStart + 2];
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38 | for (; k < newLen; k++) A[k] = O[k + actualDeleteCount - insertCount];
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39 |
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40 | return A;
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41 | }
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42 | });
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43 |
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44 | addToUnscopables('toSpliced');
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