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node_modules/es-abstract/2023/ArraySpeciesCreate.js
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1lostsun
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05 май 2025, 11:35
05 май 2025, 11:35
fe8f535
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'use strict'; var GetIntrinsic = require('get-intrinsic'); var $species = GetIntrinsic('%Symbol.species%', true); var $TypeError = require('es-errors/type'); var isInteger = require('math-intrinsics/isInteger'); var ArrayCreate = require('./ArrayCreate'); var Get = require('./Get'); var IsArray = require('./IsArray'); var IsConstructor = require('./IsConstructor'); var isObject = require('../helpers/isObject'); // https://262.ecma-international.org/12.0/#sec-arrayspeciescreate module.exports = function ArraySpeciesCreate(originalArray, length) { if (!isInteger(length) || length < 0) { throw new $TypeError('Assertion failed: length must be an integer >= 0'); } var isArray = IsArray(originalArray); if (!isArray) { return ArrayCreate(length); } var C = Get(originalArray, 'constructor'); // TODO: figure out how to make a cross-realm normal Array, a same-realm Array // if (IsConstructor(C)) { // if C is another realm's Array, C = undefined // Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(Array))) === null ? // } if ($species && isObject(C)) { C = Get(C, $species); if (C === null) { C = void 0; } } if (typeof C === 'undefined') { return ArrayCreate(length); } if (!IsConstructor(C)) { throw new $TypeError('C must be a constructor'); } return new C(length); // Construct(C, length); };