Mercurial > repos > other > SevenLanguagesInSevenWeeks
view 1-Ruby/acts_as_csv_module.rb @ 26:d50ff917c163
Change function calls so methods get patched in anyway
author | IBBoard <dev@ibboard.co.uk> |
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date | Fri, 20 Jan 2017 21:03:13 +0000 |
parents | cd874e58dbc5 |
children | 2ea3b5e9b41b |
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#--- # Excerpted from "Seven Languages in Seven Weeks", # published by The Pragmatic Bookshelf. # Copyrights apply to this code. It may not be used to create training material, # courses, books, articles, and the like. Contact us if you are in doubt. # We make no guarantees that this code is fit for any purpose. # Visit http://www.pragmaticprogrammer.com/titles/btlang for more book information. #--- module ActsAsCsv def self.included(base) base.extend ClassMethods # The book doesn't do this, but it is possible to add the methods # without having the inheriting class call a second function to do it base.acts_as_csv end module ClassMethods def acts_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 end attr_accessor :headers, :csv_contents def initialize read end end end class RubyCsv # no inheritance! You can mix it in include ActsAsCsv # Also, nothing to do beyond the "include" - it automatically defines the methods! end m = RubyCsv.new puts m.headers.inspect puts m.csv_contents.inspect