有包含的反义词吗?对于 Ruby 数组? [英] Is there an opposite of include? for Ruby Arrays?

问题描述

我的代码中有以下逻辑:

I've got the following logic in my code:

if !@players.include?(p.name)
  ...
end

@players 是一个数组.有没有一种方法可以避免 !?

@players is an array. Is there a method so I can avoid the !?

理想情况下，这个片段应该是:

Ideally, this snippet would be:

if @players.does_not_include?(p.name)
  ...
end

推荐答案

if @players.exclude?(p.name)
    ...
end

ActiveSupport 将 exclude? 方法添加到 Array、Hash 和 String.这不是纯 Ruby，但被很多 Ruby 爱好者使用.

ActiveSupport adds the exclude? method to Array, Hash, and String. This is not pure Ruby, but is used by a LOT of rubyists.

来源:主动支持核心扩展(Rails 指南)

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