带有双冒号的 Ruby 类命名约定 [英] Ruby class naming convention with double colon

问题描述

我知道 Ruby 中的 :: 是一个作用域解析操作符，用于访问模块和类中的方法，但是使用 :: 命名类是否合适?

示例

class Foo::Bar::Bee <Foo::Bar::昆虫def a_method[...]结尾结尾

解决方案

如果正确"是指语法正确 - 是.

这样做并没有什么本质上的错误，如果您在单独的文件中定义子类(下面的示例)，那么这是一种相对常见的做法.

# lib/foo.rb模块 Foo结尾# lib/foo/bar.rb类 Foo::Bar结尾

如果您不能确定父模块或类是否已经存在，我会避免以这种方式定义类，因为由于父模块(例如 Foo) 不存在.出于这个原因，您不会看到很多遵循更简洁模式的开源软件.

孤立地，这行不通:

class Foo::Bar结尾

然而，这会起作用:

模块 Foo班级酒吧结尾结尾

I know the :: in Ruby is a scope resolution operator to access methods within modules and classes, but is it proper to name classes using ::?

Example

class Foo::Bar::Bee < Foo::Bar::Insect

  def a_method
    [...]
  end

end

解决方案

If by "proper" you mean syntactically correct — yes.

There's nothing inherently wrong with doing it, and if you're defining a subclass in a separate file (example below) then it's a relatively common practice.

# lib/foo.rb
module Foo
end

# lib/foo/bar.rb
class Foo::Bar
end

I would avoid defining classes this way if you cannot be sure that the parent module or class already exists, though, as you'll get a NameError due to the parent (e.g. Foo) not existing. For this reason, you won't see much open source software that follows the more terse pattern.

In isolation, this will not work:

class Foo::Bar
end

This, however, would work:

module Foo
  class Bar
  end
end

这篇关于带有双冒号的 Ruby 类命名约定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！