轨（或Ruby）：是/否，而不是真/假 [英] Rails (or Ruby): Yes/No instead of True/False

问题描述

我知道我可以很容易地编写一个函数，并把它的应用控制器，但我宁愿没有，如果有别的东西已经这样做了。基本上我想有这样的：

I know I could easily write a function and put it in the application controller, but I'd rather not if there is something else that does this already. Basically I want to have something like:

>> boolean_variable?
=> true
>> boolean_variable?.yesno
=> yes
>> boolean_variable?.yesno.capitalize
=> Yes

有没有这样的事情已经在Rails框架？

is there something like this already in the Rails framework?

推荐答案

没有这种内置的辅助存在，但它十分容易实现：

No such built-in helper exists, but it's trivially easy to implement:

class TrueClass
  def yesno
    "Yes"
  end
end

class FalseClass
  def yesno
    "No"
  end
end

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