Ruby-on-rails 3.days.ago、2.hours.from_now 等没有 Rails？
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3.days.ago, 2.hours.from_now etc without Rails?
提问by d11wtq
Some book mentioned some gem to decorate numbers with #days, #megabytes, #minutesetc. 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.
有些书中提到的一些宝石与装饰数字#days，#megabytes，#minutes等等。这是只有在的ActiveSupport，还是有提供此功能用于（小）小宝石无轨宝石？我想将此功能用作 DSL 中的一小部分。
回答by Michael Kohl
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:
我不确定除了 之外是否还有另一个 gem 可用ActiveSupport，但是自己制作一个小版本真的很简单：
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_nowcan be implemented like agobut with + selfand weeks, hoursetc. like daysusing different constants.
from_now可以等来实现ago，但与+ self和weeks，hours等等days使用不同的常数。
回答by Jordan Running
ActiveSupporthas this functionality. It was originally part of Rails but can now be used separately.
ActiveSupport具有此功能。它最初是 Rails 的一部分，但现在可以单独使用。
