最近在开发中遇到了一个需求,一大堆的图片都需要调用两个接口。这对单线程的 JavaScript 运行环境构成了挑战,容易影响用户体验。所以决定学习 Web Workers 并记录一下。
Web Workers 的作用就是提供一个多线程环境,允许将一些繁重任务&…
一、算法一
Amazon would like to enforce a password policy that when a user changes their password, the new password cannot be similar to the current one. To determine whether two passwords are similar, they take the new password, choose a set of indices a…