问题
I am developing an application for reporting and analytic,where I need to generate data on a daily basis and put it in a CSV.To be more clear, if I take the report today like day one any how I can get the report thats already done, if I get the report tomorrow I should be able to get the data of today,yesterday. If i take after 4 days I should get the report starting from day 1 to day 4.
How it can be done. Looking for heads up
回答1:
How about this:
today = Date.today
tomorrow = today.next
four_days_ago = 4.days.ago(today)
four_days_later = 4.days.since(today)
(today..(4.days.since(today)).each {|d| puts d}
来源：https://stackoverflow.com/questions/9770151/iterating-the-dates-in-ruby-on-rails