Do browsers optimise this stuff?
fn swap(arr: [int], i: int, j: int) {
，详情可参考新收录的资料
Travel operators say Chinese and North Koreans can now buy tickets for services leaving this week，详情可参考新收录的资料
Communities secretary tells MPs that government has to act against record levels of hate crimes。关于这个话题，新收录的资料提供了深入分析