It’s deeply nested expressions. I’m not writing it with EMACS or other IDEs, but with my own editor. So it might looks strange.
The thing got me worried is I never wrote code nested in so many levels before. It’s fine in my own way. But what others would think about my code? Is such code common in the community?
The logics in the snippets is to group tasks by year/week/day and then render them in lists. I used
group-by for 3 times.