Ruby on Rails 中的@变量 [英] @ variables in Ruby on Rails

问题描述

@title 和 title 有什么区别?因为它们都可以是变量名.另外，我如何决定应该使用哪种变量?有没有@?

What's the difference between @title and title? Since both of them can be variable names. Also, how do I decide which kind of variable I should use? With @ or not?

推荐答案

title 是一个局部变量.它们只存在于其范围内(当前块)

title is a local variable. They only exists within its scope (current block)

@title 是一个实例变量 - 可用于类中的所有方法.

@title is an instance variable - and is available to all methods within the class.

您可以在此处阅读更多信息:http://strugglingwithruby.blogspot.dk/2010/03/variables.html

You can read more here: http://strugglingwithruby.blogspot.dk/2010/03/variables.html

在 Ruby on Rails 中 - 将控制器中的变量声明为实例变量 (@title) 使它们可用于您的视图.

In Ruby on Rails - declaring your variables in your controller as instance variables (@title) makes them available to your view.

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