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- 'use strict';
- function uniqNoSet(arr) {
- var ret = [];
- for (var i = 0; i < arr.length; i++) {
- if (ret.indexOf(arr[i]) === -1) {
- ret.push(arr[i]);
- }
- }
- return ret;
- }
- function uniqSet(arr) {
- var seen = new Set();
- return arr.filter(function (el) {
- if (!seen.has(el)) {
- seen.add(el);
- return true;
- }
- return false;
- });
- }
- function uniqSetWithForEach(arr) {
- var ret = [];
- (new Set(arr)).forEach(function (el) {
- ret.push(el);
- });
- return ret;
- }
- function doesForEachActuallyWork() {
- var ret = false;
- (new Set([true])).forEach(function (el) {
- ret = el;
- });
- return ret === true;
- }
- if ('Set' in global) {
- if (typeof Set.prototype.forEach === 'function' && doesForEachActuallyWork()) {
- module.exports = uniqSetWithForEach;
- } else {
- module.exports = uniqSet;
- }
- } else {
- module.exports = uniqNoSet;
- }
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