Ruby Day 3

csv.rb

module ActsAsCsv
  
  def self.included(base)
    base.extend ClassMethods
    base.act_as_csv
  end
  
  module ClassMethods
    def act_as_csv
      include InstanceMethods
    end
  end
  
  module InstanceMethods
    
    def read
     @csv_contents=[]
     filename=self.class.to_s.downcase+ '.txt'
     file=File.new(filename)
     @headers=file.gets.chomp.split(', ')
     
     file.each do |row|
      @csv_contents << row.chomp.split(', ')  
     end
     
     CsvRow.headers @headers;
    end
    
    attr_accessor :headers, :csv_contents

    def initialize
      read
    end    
    
    def each
        @csv_contents.each {|row| yield CsvRow.new(row)}
    end
  end
  
end

class RubyCsv
  include ActsAsCsv
end

class CsvRow
   
   def initialize(row=[])
     @row=row
     @headerValues=Hash.new
     @row.each.with_index{|v,i| @headerValues[@@headers[i]]=v}
   end  
   
   def method_missing(name,*args,&block)
     @headerValues[name]
   end
   
   def self.headers(headers=[])
     @@headers=headers.collect{|v|v.to_sym}
   end
end

m=RubyCsv.new.each {|row| print row.Name,"=>",row.Price; puts }