ranking with one click.
The idea behind choosing something "simple" like this was to focus my attention on the "tooling setup" and "basic UI building" functionality of each platform rather than the application logic.
，推荐阅读新收录的资料获取更多信息
Go to technology，更多细节参见新收录的资料
return [y is not None and xs[y] for y in presum(ys)]