如何获取Ruby中某个月份的天数,记录一年? [英] How to get the number of days in a given month in Ruby, accounting for year?
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问题描述
解决方案
这是ActiveSupport的实现(稍微修改一下):
COMMON_YEAR_DAYS_IN_MONTH = [无,31,28,31,30,31,30,31,31,30,31,30,31]
def days_in_month(month,year = Time.now.year)
return 29 if month == 2&& Date.gregorian_leap?(年)
COMMON_YEAR_DAYS_IN_MONTH [月]
结束
I'm sure there's a good simple elegant one-liner in Ruby to give you the number of days in a given month, accounting for year, such as "February 1997". What is it?
解决方案
This is the implementation from ActiveSupport (a little adapted):
COMMON_YEAR_DAYS_IN_MONTH = [nil, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
def days_in_month(month, year = Time.now.year)
return 29 if month == 2 && Date.gregorian_leap?(year)
COMMON_YEAR_DAYS_IN_MONTH[month]
end
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