如何检查 Ruby 对象是否为布尔值 [英] How to check if a Ruby object is a Boolean

问题描述

我似乎无法轻松检查对象是否为布尔值.Ruby 中有这样的东西吗?

I can't seem to check if an object is a boolean easily. Is there something like this in Ruby?

true.is_a?(Boolean)
false.is_a?(Boolean)

现在我正在这样做，并想缩短它:

Right now I'm doing this and would like to shorten it:

some_var = rand(1) == 1 ? true : false
(some_var.is_a?(TrueClass) || some_var.is_a?(FalseClass))

推荐答案

我能想到的最简单的方法:

Simplest way I can think of:

# checking whether foo is a boolean
!!foo == foo

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