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- 'use strict';
- var hasOwn = Object.prototype.hasOwnProperty;
- module.exports = function (xs, f) {
- if (xs.map) {
- return xs.map(f);
- }
- var res = [];
- for (var i = 0; i < xs.length; i++) {
- var x = xs[i];
- if (hasOwn.call(xs, i)) {
- res.push(f(x, i, xs));
- }
- }
- return res;
- };
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