source: trip-planner-front/node_modules/core-js/internals/collection-from.js

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
Line 
1'use strict';
2// https://tc39.github.io/proposal-setmap-offrom/
3var aFunction = require('../internals/a-function');
4var bind = require('../internals/function-bind-context');
5var iterate = require('../internals/iterate');
6
7module.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};
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