From: Nasir Khan <rubylearner@...>
Date: 2006-06-22T14:52:23+09:00
Subject: Question about Vector class

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Hi,
I am extremely new to Ruby, just my first week so I apologize if this has
already been discussed or is completely absurd.

I was using the library Vector class defined in matrix.rb in one of my
programs, the [] method in the library class does not check for range out of
bounds and the []= does not even exist. In my program I extended the Vector
class as follows -

#
-------------------------------------------------------------------------------
require 'matrix'

# Extend the Vector library class for []=
# defined in src/ruby-1.8.4/matrix.rb

class Vector
  include ExceptionForMatrix

  # []= not defined in the library class
  def []= (i, val)
    Vector.Raise ErrDimensionMismatch if i >= @elements.size
    @elements[i] = val
  end

  # Fix the [] in library Vector class
  def [](i)
    Vector.Raise ErrDimensionMismatch if i >= @elements.size
    @elements[i]
  end
end
#-------------------------------------------------------------------------------

Should this not be part of matrix.rb itself?

Best Regards
Nasir

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