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- 'use strict';
- // TODO: Remove from `core-js@4`
- var ArrayBufferViewCore = require('../internals/array-buffer-view-core');
- var lengthOfArrayLike = require('../internals/length-of-array-like');
- var isBigIntArray = require('../internals/is-big-int-array');
- var toAbsoluteIndex = require('../internals/to-absolute-index');
- var toBigInt = require('../internals/to-big-int');
- var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
- var fails = require('../internals/fails');
- var aTypedArray = ArrayBufferViewCore.aTypedArray;
- var getTypedArrayConstructor = ArrayBufferViewCore.getTypedArrayConstructor;
- var exportTypedArrayMethod = ArrayBufferViewCore.exportTypedArrayMethod;
- var max = Math.max;
- var min = Math.min;
- // some early implementations, like WebKit, does not follow the final semantic
- var PROPER_ORDER = !fails(function () {
- // eslint-disable-next-line es/no-typed-arrays -- required for testing
- var array = new Int8Array([1]);
- var spliced = array.toSpliced(1, 0, {
- valueOf: function () {
- array[0] = 2;
- return 3;
- }
- });
- return spliced[0] !== 2 || spliced[1] !== 3;
- });
- // `%TypedArray%.prototype.toSpliced` method
- // https://tc39.es/proposal-change-array-by-copy/#sec-%typedarray%.prototype.toSpliced
- exportTypedArrayMethod('toSpliced', function toSpliced(start, deleteCount /* , ...items */) {
- var O = aTypedArray(this);
- var C = getTypedArrayConstructor(O);
- var len = lengthOfArrayLike(O);
- var actualStart = toAbsoluteIndex(start, len);
- var argumentsLength = arguments.length;
- var k = 0;
- var insertCount, actualDeleteCount, thisIsBigIntArray, convertedItems, value, newLen, A;
- if (argumentsLength === 0) {
- insertCount = actualDeleteCount = 0;
- } else if (argumentsLength === 1) {
- insertCount = 0;
- actualDeleteCount = len - actualStart;
- } else {
- actualDeleteCount = min(max(toIntegerOrInfinity(deleteCount), 0), len - actualStart);
- insertCount = argumentsLength - 2;
- if (insertCount) {
- convertedItems = new C(insertCount);
- thisIsBigIntArray = isBigIntArray(convertedItems);
- for (var i = 2; i < argumentsLength; i++) {
- value = arguments[i];
- // FF30- typed arrays doesn't properly convert objects to typed array values
- convertedItems[i - 2] = thisIsBigIntArray ? toBigInt(value) : +value;
- }
- }
- }
- newLen = len + insertCount - actualDeleteCount;
- A = new C(newLen);
- for (; k < actualStart; k++) A[k] = O[k];
- for (; k < actualStart + insertCount; k++) A[k] = convertedItems[k - actualStart];
- for (; k < newLen; k++) A[k] = O[k + actualDeleteCount - insertCount];
- return A;
- }, !PROPER_ORDER);
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