Rails周月數

Question

我如何在rails中計算給定月份的週數？

感謝

Answer 1

我不知道你想要什麼......但也許你想是這樣的：

(Time::days_in_month(05,2010).to_f/7)

#> 4.42857142857143

Answer 2

我需要知道多少個星期，包括部分一個月裏有一個星期。把它想成日曆中的行。你需要多少行？你必須考慮天數以及這個月的開始日期。例如2011年10月實際上有6個獨特的周。

這就是我的回答（@date是當前日期）：

@week_count = (0.5 + (@date.at_end_of_month.day + @date.at_beginning_of_month.wday).to_f/7.0).round 

Answer 3

您可以使用以下方法：

WEEK_NUMBER_FORMAT = '%W' 

    # Returns the first day of month. 
    # If invoked without any arguments, this would return the 
    # first day of current month 
    def first_day_of_month(date_time=Time.now) 
    date_time.beginning_of_month 
    end 

    # Returns the last day of month. 
    # If invoked without any arguments, this would return the 
    # last day of current month 
    def last_day_of_month(date_time=Time.now) 
    date_time.end_of_month 
    end 

    # Returns the week number in the year in which the specified date_time lies. 
    # If invoked without any arguments, this would return the 
    # the week number in the current year 
    def week_number(date_time=Time.now) 
    date_time.strftime(WEEK_NUMBER_FORMAT).to_i 
    end 

    # Returns the number of weeks in the month in which the specified date_time lies. 
    # If invoked without any arguments, this would return the 
    # the number of weeks in the current month 
    def weeks_in_month(date_time=Time.now) 
    week_number(last_day_of_month(date_time)) - week_number(first_day_of_month(date_time)) + 1 
    end 

用法：weeks_in_month（DATE_TIME）

希望它幫助：

謝謝，

周爲一個月

Jignesh

Answer 4

使用寶石week_of_month

d = Date.new(2012,1,1) 

d.total_weeks 

=> 5 

Answer 5

def number_of_weeks_month(start_of_month, count, end_of_month) 
if start_date > end_of_month 
    return count 
else 
    number_of_weeks_month(start_date.end_of_week + 1, count + 1, end_of_month) 
end 
end 

GET號這樣

number_of_weeks_month(Date.parse("2017-11-01"),0,Date.parse("2017-11-30")) 

這回4