|
Last change
on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
|
initial commit
|
-
Property mode
set to
100644
|
|
File size:
852 bytes
|
| Rev | Line | |
|---|
| [6a3a178] | 1 | 'use strict';
|
|---|
| 2 | // https://tc39.github.io/proposal-setmap-offrom/
|
|---|
| 3 | var aFunction = require('../internals/a-function');
|
|---|
| 4 | var bind = require('../internals/function-bind-context');
|
|---|
| 5 | var iterate = require('../internals/iterate');
|
|---|
| 6 |
|
|---|
| 7 | module.exports = function from(source /* , mapFn, thisArg */) {
|
|---|
| 8 | var length = arguments.length;
|
|---|
| 9 | var mapFn = length > 1 ? arguments[1] : undefined;
|
|---|
| 10 | var mapping, array, n, boundFunction;
|
|---|
| 11 | aFunction(this);
|
|---|
| 12 | mapping = mapFn !== undefined;
|
|---|
| 13 | if (mapping) aFunction(mapFn);
|
|---|
| 14 | if (source == undefined) return new this();
|
|---|
| 15 | array = [];
|
|---|
| 16 | if (mapping) {
|
|---|
| 17 | n = 0;
|
|---|
| 18 | boundFunction = bind(mapFn, length > 2 ? arguments[2] : undefined, 2);
|
|---|
| 19 | iterate(source, function (nextItem) {
|
|---|
| 20 | array.push(boundFunction(nextItem, n++));
|
|---|
| 21 | });
|
|---|
| 22 | } else {
|
|---|
| 23 | iterate(source, array.push, { that: array });
|
|---|
| 24 | }
|
|---|
| 25 | return new this(array);
|
|---|
| 26 | };
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
