7l7w ruby day3

gistfile1.rb

# Modify the CSV application to support an each method to return a CsvRow object. 
# Use method_missing on that CsvRow to return the value for the column of each heading.
#
# Kontonummer, Name
# 12144445678, ice09

class CsvRow
  attr_accessor :values, :keys
  
  def initialize( keys, values )
    @keys = keys
    @values = values 
  end
  
  def method_missing(id, *args)
    # if method is left out (ie. return all values), id == :to_ary
    if (id==:to_ary) 
      then return @values 
      else return @values[@keys.index(id.to_s)]
    end
  end
end

module ActsAsCsv
  def self.included(base)
    base.extend ClassMethods
  end
  
  module ClassMethods
    def acts_as_csv
      include InstanceMethods
      include Enumerable
    end
  end
  
  module InstanceMethods   
    attr_accessor :headers, :csv_contents
    
    def each &block
       @csv_contents.each{|csvRow| block.call(csvRow)}
    end
    
    def read
      @csv_contents = []
      filename = self.class.to_s.downcase + '.txt'
      file = File.new(filename)
      @headers = file.gets.chomp.split(';').collect{|s| s.delete("\"")}
      
      file.each do |row|
        values = row.chomp.split(';').collect{|s| s.delete("\"")}
        @csv_contents << CsvRow.new(@headers, values)
      end
    end
    
    def initialize
      read 
    end
  end
end

class RubyCsv  # no inheritance! You can mix it in
  include ActsAsCsv
  acts_as_csv
end

# use it
m = RubyCsv.new
m.each { |it| puts it.Kontonummer }