| 'use strict'; |
| |
| var ArraySpeciesCreate = require('es-abstract/2021/ArraySpeciesCreate'); |
| var FlattenIntoArray = require('es-abstract/2021/FlattenIntoArray'); |
| var Get = require('es-abstract/2021/Get'); |
| var ToIntegerOrInfinity = require('es-abstract/2021/ToIntegerOrInfinity'); |
| var ToLength = require('es-abstract/2021/ToLength'); |
| var ToObject = require('es-abstract/2021/ToObject'); |
| |
| module.exports = function flat() { |
| var O = ToObject(this); |
| var sourceLen = ToLength(Get(O, 'length')); |
| |
| var depthNum = 1; |
| if (arguments.length > 0 && typeof arguments[0] !== 'undefined') { |
| depthNum = ToIntegerOrInfinity(arguments[0]); |
| } |
| |
| var A = ArraySpeciesCreate(O, 0); |
| FlattenIntoArray(A, O, sourceLen, 0, depthNum); |
| return A; |
| }; |