1. 双重循环
2. indexOf
3. 排序后去重

优化




拓展
https://github.com/jawil/blog/issues/1
https://github.com/jawil/blog/issues/5
test
https://felix-kling.de/js-loose-comparison/





https://github.com/jawil/blog/issues/1
https://github.com/jawil/blog/issues/5
test
https://felix-kling.de/js-loose-comparison/
让时间为你证明