Rails - 给定@Comments - 如何在不重新点击数据库的情况下获得倒数第二条评论 [英] Rails - Given @Comments - how to obtain the 2nd to last comment w/o rehitting the db

问题描述

给定的@comments 可以包含 1 个或多个记录.如何获得倒数第二条评论?

given @comments which can contain 1 or more records. How do I obtain the 2nd to last comment?

谢谢

推荐答案

我想这也可以称为倒数第二条记录:

I suppose that would also be called the penultimate record:

@comments[-2]

这里是文档¹ Ruby 有趣的索引运算符.

Here are the docs¹ to Ruby's interesting index operator.

<小时>^{1.Rubyists，请注意我是如何链接它的.如果您从 ruby​​-doc 链接中删除该版本，则引用将是持久且最新的.}

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