问题描述
有些书提到了一些用 #days ， #megabytes ， #minutes 等。这只是在ActiveSupport中，还是有一个小的宝石，提供此功能用于（小）非轨道宝石？我想在一个小小的宝石中使用这个功能作为DSL的一部分。
Some book mentioned some gem to decorate numbers with #days, #megabytes, #minutes etc. Is this only in ActiveSupport, or is there a smaller gem that provides this functionality for use in (small) non-rails gems? I want to use this functionality as part of a DSL in a tiny little gem.
推荐答案
我不确定是否有另一个除了 ActiveSupport 之外，还可以使用gem，但你自己做一个小版本真的很简单：
I'm not sure if there's another gem available besides ActiveSupport, but it would be really straight-forward to make a small version yourself:
class Fixnum
SECONDS_IN_DAY = 24 * 60 * 60
def days
self * SECONDS_IN_DAY
end
def ago
Time.now - self
end
end
3.days.ago #=> 2011-06-18 08:45:29 0200
from_now 可以像前但以 + self 和周，小时等，如天使用不同的常量。
from_now can be implemented like ago but with + self and weeks, hours etc. like days using different constants.
这篇关于3.days.ago，2.hours.from_now等没有Rails？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！