Ruby On Rails Interview Questions and Answers
Question: How to define Instance variables?Answer:Instance variables are defined using single @ symbol. @foo = "Hello" Within a class they can be declared as below: class Animal attr_accessor :name, :age end Next you can query an object instance to find which instance variables it has. anim = Animal.new anim.instance_variables => [ ] anim.name="John" anim.age = 3 => [:@age, :@name] In the above case we did not put the @ symbol before the instance variables but it is implied. |
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