Override array method : Array Extension « Array « Ruby

1. Ruby
2. Array
3. Array Extension

Override array method

class Array2 < Array

  def [](index)
    if index>0
      super(index-1)
    else
      raise IndexError
    end
  end

  def []=(index,obj)
    if index>0
      super(index-1,obj)
    else
      raise IndexError
    end
  end

end


x = Array2.new

x[1]=5
x[2]=3
x[0]=1  # Error
x[-1]=1 # Error

 

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