紅寶石確定季（秋，冬，春季或夏季）

Question

我的工作是應該確定基於日期範圍當年的「季節」的腳本：

例如：

January 1 - April 1: Winter 
April 2 - June 30: Spring 
July 1 - September 31: Summer 
October 1 - December 31: Fall 

我不知道如何最好的方式（或最好的紅寶石方式）去做這件事。其他人碰到如何做到這一點？

Answer 1

9月31日？

作爲leifg建議的，在這裏它是在代碼：

require 'Date' 

class Date 

    def season 
    # Not sure if there's a neater expression. yday is out due to leap years 
    day_hash = month * 100 + mday 
    case day_hash 
     when 101..401 then :winter 
     when 402..630 then :spring 
     when 701..930 then :summer 
     when 1001..1231 then :fall 
    end 
    end 
end 

一旦定義，例如稱之爲像這樣：

d = Date.today 
d.season 

Answer 2

您可以嘗試使用範圍和Date對象：

http://www.tutorialspoint.com/ruby/ruby_ranges.htm

Answer 3

沒有範圍。

require 'date' 

    def season 
     year_day = Date.today.yday().to_i 
     year = Date.today.year.to_i 
     is_leap_year = year % 4 == 0 && year % 100 != 0 || year % 400 == 0 
     if is_leap_year and year_day > 60 
     # if is leap year and date > 28 february 
     year_day = year_day - 1 
     end 

     if year_day >= 355 or year_day < 81 
     result = :winter 
     elsif year_day >= 81 and year_day < 173 
     result = :spring 
     elsif year_day >= 173 and year_day < 266 
     result = :summer 
     elsif year_day >= 266 and year_day < 355 
     result = :autumn 
     end 

     return result 
    end