Rails 赶脚我写的是 C 代码，怎么改善为 Rails 风格？
def has_staff_with_role?(role_name)
staffs.each do |staff|
if staff.has_role?(role_name)
return true
end
end
return false
end
def has_staff_with_role?(role_name)
staffs.any?{|staff| staff.has_role? role_name }
end
