blob: cb2c9d75355eba4a9dcb941a8f973ac8fc6b5943 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
'use strict';
var $ = require('../internals/export');
var flattenIntoArray = require('../internals/flatten-into-array');
var toObject = require('../internals/to-object');
var toLength = require('../internals/to-length');
var toInteger = require('../internals/to-integer');
var arraySpeciesCreate = require('../internals/array-species-create');
// `Array.prototype.flat` method
// https://github.com/tc39/proposal-flatMap
$({ target: 'Array', proto: true }, {
flat: function flat(/* depthArg = 1 */) {
var depthArg = arguments.length ? arguments[0] : undefined;
var O = toObject(this);
var sourceLen = toLength(O.length);
var A = arraySpeciesCreate(O, 0);
A.length = flattenIntoArray(A, O, O, sourceLen, 0, depthArg === undefined ? 1 : toInteger(depthArg));
return A;
}
});
|
