John-Li/my_programs — comment on commit 06616c30198782b5d7a8a56408c0619f298162f2
File:  line 0
By John-Li:

Two problems appeared:
1. `range` has no `/` method.
2. `array` don't work with `range` inside it. So I couldn't match year with `range` inside of `array`.

So I'll try to develop your idea...