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- 'use strict';
- var $ = require('../internals/export');
- var addToUnscopables = require('../internals/add-to-unscopables');
- var doesNotExceedSafeInteger = require('../internals/does-not-exceed-safe-integer');
- var lengthOfArrayLike = require('../internals/length-of-array-like');
- var toAbsoluteIndex = require('../internals/to-absolute-index');
- var toIndexedObject = require('../internals/to-indexed-object');
- var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
-
- var $Array = Array;
- var max = Math.max;
- var min = Math.min;
-
- // `Array.prototype.toSpliced` method
- // https://tc39.es/ecma262/#sec-array.prototype.tospliced
- $({ target: 'Array', proto: true }, {
- toSpliced: function toSpliced(start, deleteCount /* , ...items */) {
- var O = toIndexedObject(this);
- var len = lengthOfArrayLike(O);
- var actualStart = toAbsoluteIndex(start, len);
- var argumentsLength = arguments.length;
- var k = 0;
- var insertCount, actualDeleteCount, newLen, A;
- if (argumentsLength === 0) {
- insertCount = actualDeleteCount = 0;
- } else if (argumentsLength === 1) {
- insertCount = 0;
- actualDeleteCount = len - actualStart;
- } else {
- insertCount = argumentsLength - 2;
- actualDeleteCount = min(max(toIntegerOrInfinity(deleteCount), 0), len - actualStart);
- }
- newLen = doesNotExceedSafeInteger(len + insertCount - actualDeleteCount);
- A = $Array(newLen);
-
- for (; k < actualStart; k++) A[k] = O[k];
- for (; k < actualStart + insertCount; k++) A[k] = arguments[k - actualStart + 2];
- for (; k < newLen; k++) A[k] = O[k + actualDeleteCount - insertCount];
-
- return A;
- }
- });
-
- addToUnscopables('toSpliced');
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