Conversões Ruby to_bool (monkeypatching)

class Object
  def to_bool
    self ? true : false
  end
end

class String
  def to_bool
    return true if self == true || self =~ (/(true|t|yes|y|1)$/i)
    return false if self == false || self.empty? || self =~ (/(false|f|no|n|0)$/i)
    raise ArgumentError.new("invalid value for Boolean: "#{self}"""")
  end
end

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