[79a0317] | 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 | // `Array.prototype.toSpliced` method
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| 15 | // https://tc39.es/ecma262/#sec-array.prototype.tospliced
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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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