atter_accessor_behavior.rb

#!/usr/bin/env ruby

class InstanceVariableEval

  attr_accessor :val

  def initialize
    @val = "initial data"
  end

  def set_from_instance_method_through_accessor
    val = "set_from_instance_method_through_accessor"
  end

end


a = InstanceVariableEval.new

puts a.val
a.set_from_instance_method_through_accessor
puts a.val
a.val = "set_through_accessor"
puts a.val

## Following is the output. I can't understand why val is not updated by the method "set_from_instance_method_through_accessor".
# initial data
# initial data
# set_through_accessor