swap(&arr[j], &arr[j + 1]);
Before string caching, the code would dynamically generate this banner based on your current terminal dimensions on every frame. But that’s wasteful! Now, we pre-compute every banner size (accounting for any amount of shutdown time remaining) ahead of time and slam that pre-computed banner into a byte buffer, skipping the intermediate allocation.，详情可参考爱思助手下载最新版本
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Фото: U.S. Marine Corps / Lance Cpl. Tyler Forti
Фото: Дмитрий Астахов / РИА Новости