From: wiz_pendases@...
Date: 2007-10-12T03:10:06+09:00
Subject: I need some help plz with my ruby project.

First, i need to extend the student class, and its to be enumerable by
courses.  Then, show off the new functionality supported by this
change by writing an expression that returns a list of all of the
grades a student has earned in the courses he or she has completed for
the major.

here is what I got so far...what am i missing
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irb

# This class initializes a new student with ID,
# and shows a list of completed courses,
# and also shows a list of grades from completed courses.
class Student

  include Enumerable

  attr_reader :name, :id

  # Initializing the students name and ID.
  # Name = Student's name.
  # ID = Student's ID.
  # Initializing courses to equal a new hash.
  def initialize(name, id)
    @name = name
    @id = id
    @courses = {}
  end

  # Adding a course to the set of those completed.
  def add_course(code, name, grade)
    @courses[code] = [code, name, grade]
  end

  # Retrieving the grade for a particular course.
  def get_grade(code)
    (c=@courses[code]) && c[Grade]
  end

  # Changing the grade for a course completed.
  def set_grade(code, grade)
    @courses[code][Grade] = grade
  end

  # Providing a list of all of the courses completed.
  def list_courses
    @courses.values
  end

  def each_grade
    @courses.each { |course| yeild course }
  end
end


s1 = Student.new("Eric", "00101")
s1.add_course("22c:021", "Computer Science I", "B-")
s1.each_grade.collect { |course| do course[2] }
puts s1
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if you help meh out soon it would be great...thanks and later......