| Yang Guo | 4fd355c | 2019-09-19 10:59:03 +0200 | [diff] [blame] | 1 | module.exports = function (xs, fn) { |
| 2 | var res = []; | ||||
| 3 | for (var i = 0; i < xs.length; i++) { | ||||
| 4 | var x = fn(xs[i], i); | ||||
| 5 | if (isArray(x)) res.push.apply(res, x); | ||||
| 6 | else res.push(x); | ||||
| 7 | } | ||||
| 8 | return res; | ||||
| 9 | }; | ||||
| 10 | |||||
| 11 | var isArray = Array.isArray || function (xs) { | ||||
| 12 | return Object.prototype.toString.call(xs) === '[object Array]'; | ||||
| 13 | }; | ||||