Question

我如何在rails中计算给定月份的周数？

由于

Answer 1

我不确切地知道你想要什么...但也许你想要这样的东西：

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

#> 4.42857142857143

Answer 2

我需要知道有多少周，包括一个月内的部分周。可以把它想象成日历中的行。你需要多少行？您必须考虑天数以及月份的开始日期。例如，2011年10月实际上有6个独特周。

这是我的回答（@date是当前日期）：

@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）

希望有所帮助：

谢谢，

Jignesh

Answer 4

def number_of_weeks_in_month
  4
end

Answer 5

使用gem week_of_month

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

d.total_weeks

=> 5

Answer 6

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

获得像这样的月份周数

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

这回归4

Answer 7

Date.today.end_of_month.day/7
=> 4

Rails月份的周数

7 个答案: