You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
20 lines
865 B
20 lines
865 B
'use strict'; |
|
var $ = require('../internals/export'); |
|
var flattenIntoArray = require('../internals/flatten-into-array'); |
|
var toObject = require('../internals/to-object'); |
|
var lengthOfArrayLike = require('../internals/length-of-array-like'); |
|
var toIntegerOrInfinity = require('../internals/to-integer-or-infinity'); |
|
var arraySpeciesCreate = require('../internals/array-species-create'); |
|
|
|
// `Array.prototype.flat` method |
|
// https://tc39.es/ecma262/#sec-array.prototype.flat |
|
$({ target: 'Array', proto: true }, { |
|
flat: function flat(/* depthArg = 1 */) { |
|
var depthArg = arguments.length ? arguments[0] : undefined; |
|
var O = toObject(this); |
|
var sourceLen = lengthOfArrayLike(O); |
|
var A = arraySpeciesCreate(O, 0); |
|
A.length = flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toIntegerOrInfinity(depthArg)); |
|
return A; |
|
} |
|
});
|
|
|