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mdotasia
11,893 PointsWhy can you write #{name} instead of #{@name} when doing the string interpolation?
Does Ruby infer that name must be instance variable?
1 Answer
Andrew Gay
20,893 PointsRuby will not infer it is an instance variable, it will actually infer it is a method call if a local variable is not defined from what I read here (depending on where/how this is all happening)
http://www.tutorialspoint.com/ruby/ruby_variables.htm
"Local variables begin with a lowercase letter or _. The scope of a local variable ranges from class, module, def, or do to the corresponding end or from a block's opening brace to its close brace {}.
When an uninitialized local variable is referenced, it is interpreted as a call to a method that has no arguments."
It depends on where you are writing it. (The instance variable assignment and the local variable assignment)
Do you have a question on a specific project/with code?
Andrew Gay
20,893 PointsAndrew Gay
20,893 PointsIn the video he has the attr_reader :name
which creates the method call
So basically the #{name} is actually calling the get function that returns the instance variable name for that class.
When you write
attr_reader :nameit is similar to defining a function that returns the value for a specific instance variable, such as: