@ variables in Ruby on Rails

by

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

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

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

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

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