我之所以使用它,是因为我不喜欢go 日期文档查找strftime语法,在那里找不到它,而且必须记住它在时间文档中.
require 'date'
class Date
def dayname
DAYNAMES[self.wday]
end
def abbr_dayname
ABBR_DAYNAMES[self.wday]
end
end
today = Date.today
puts today.dayname
puts today.abbr_dayname