kblake

module AttributesSort
  def self.included(receiver)
    receiver.instance_eval do
      def build_attributes(attributes)
        "[" + attributes.map!{|a| "object.#{a}"}.join(",") + "]"
      end

      def do_attributes_sort(collection, options={})
        attributes = build_attributes(options[:sort_by])
        collection.sort_by{|object| eval(attributes)}

kblake

module AttributesSort
  def self.included(receiver)
    receiver.instance_eval do
      def build_attributes(attributes)
        "[" << attributes.map!{|attribute| "object.#{attribute}"}.join(",") << "]"
      end

      def do_attributes_sort(collection, attributes)
        attribute_array_string = build_attributes(attributes)
        collection.sort_by{|object| eval(attribute_array_string)}

kblake

module AttributesSort
  def self.included(receiver)
    receiver.instance_eval do
      def build_attributes(attributes)
        "[" << attributes.map!{|attribute| "object.#{attribute}"}.join(",") << "]"
      end

      def do_attributes_sort(collection, attributes)
        attribute_array_string = build_attributes(attributes)
        collection.sort_by{|object| eval(attribute_array_string)}

kblake

module AttributesSort
  def self.included(receiver)
    receiver.instance_eval do
      def do_attributes_sort(collection, attributes)
        collection.sort_by { |object| attributes.map { |attribute| object.send(attribute) }}
      end
    end
    Array.class_eval do
      def sortable_attributes?
        self.all? {|object| @attributes.all?{|attribute| object.respond_to?(attribute)}}

kblake

class Book
  include AttributesSort
  ...
end

def sort_libraries(libraries, key)
  libraries.map do |library|
    library.attr_sort(:sort_by => key)
  end
  libraries

kblake

class Book
  include AttributesSort
  attr_accessor :author, :date
  
  def initialize(author, date)
    @author = author
    @date = date
  end
end
 

kblake

require 'rubygems'
require 'sinatra'
require "sinatra/reloader" if development?
require 'dm-core'

DataMapper.setup( :default, "sqlite3://#{Dir.pwd}/my_app.db" )


class Post
 include DataMapper::Resource

kblake

num_array = [0,0,0,0,0,0,0,0,0,0]

#populate array
100.times do
    random_num = rand(100) + 1
    correct_index = (random_num == 100) ? 9 : random_num/10
    num_array[correct_index] += 1
end

#print histrogram

kblake

require 'rubygems'
require 'twitter'
require 'highline/import'

username = ask("Please enter twitter name")

unless username.empty?

  size = 50 #limit to 50 followers arbitrarily

kblake

require 'rubygems'
require 'pivotal-tracker'
require 'highline/import'

HighLine.track_eof = false


def story_filter(chosen_state)
  lambda {|story| story.owned_by == @name && story.current_state == chosen_state}
end