swap(&arr[i], &arr[minIdx]);
But the browser playground is what makes the repo inviting.，推荐阅读safew获取更多信息
(“Short-Lived Subscriber Certificates”),。关于这个话题，谷歌提供了深入分析
"They don't have internet all the time," he explains. "We send a message, we can see they didn't receive the message, and then they get internet, and we count the two blue ticks on WhatsApp."，详情可参考官网