Ruby - class method proxying

Sometimes it becomes necessary to wrap (wrap) the class methods into your code.

For example:

• run them in threads
• hang filters before and after
• measure performance

So let's say we have a class that pulls information about a human hacker:

Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end

1. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
2. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
3. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
4. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
6. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
8. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
9. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
10. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
11. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
12. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
13. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
14. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
15. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
16. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
17. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
18. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
19. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
20. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
21. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
22. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
23. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
24. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
25. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
26. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
27. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
28. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
29. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
30. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
31. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
32. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
33. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
34. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
35. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
36. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
37. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
38. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end
39. Copy Source | Copy HTML require 'rubygems' require 'open-uri' require 'iconv' require 'nokogiri' $KCODE = 'u' class Habr attr_accessor :user, :uid def initialize (user) @user = user @uid = get_uid end def get (url) Nokogiri::HTML( open (url)) end def get_uid html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div.karma-holder" )[ 0 ].get_attribute( 'id' ) end def get_rating result = [] html = get ( "http://#{@user}.habrahabr.ru" ) html.css( "div[@id='#{@uid}']" ).each{|el| result << el.css( 'span.mark' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'span.number' )[ 0 ].content. gsub !( ',' , '.' ).to_f result << el.css( 'dd.total' )[ 0 ].content.to_i } result end def get_posts result = [] html = get ( "http://#{@user}.habrahabr.ru/blog/" ) html.css( "div[@id='main-content'] a.topic" ).each{|el| result << { :title => el.content, :url => el.attribute( 'href' ) } } result end end

We will use it like this:

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1. info = Habr. new ( 'tenkoff' )
2. p info.get_rating
3. p info.get_posts

The simplest solution is to transfer a new instance of the class to our proxy class:

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1. proxy = proxy. new (ProxedClass.new)

To do this, we need the method method_missing :

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1. class proxy
2. def initialize (obj)
3. @ class = obj || self
4. end
5. def method_missing (name, * args, & block)
6. p "before ## {name}"
7. result = @ class .send name, * args, & block
8. p "after ## {name}"
9. result
10. end
11. end

Now our previous code can be used like this:

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1. info = proxy. new (Habr. new ( 'tenkoff' ))
2. p info.get_rating
3. p info.get_posts

If you really want to, then you can use the Proxy class as the base class for inheritance, for this we need the method_added method (we’ll have to google it here):

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1. class proxy
2. def initialize (obj = '' )
3. @ class = obj || self
4. end
5. def method_missing (name, * args, & block)
6. p "before ## {name}"
7. result = @ class .send name, * args, & block
8. p "after ## {name}"
9. result
10. end
11. def self .method_added (method)
12. if self .public_method_defined? method
13. private method
14. end
15. end
16. end

To ensure that the methods of your class fall into our method_missing method wrapper, we use the private method to make all public methods private.

You will also have to take care of the proper initialization of the base class by changing the proxied class like this:

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1. def initialize (user)
2. @user = user
3. @uid = get_uid
4. super ( self )
5. end

')
In reality, this is all black magic that will not work 100% in all cases of life.

So how does it work?
method_missing - this method works when you request a non-existent or inaccessible class method, it takes three parameters:
method name
arguments
block

Then you can use the send method, which allows you to call any method of any class, for example:

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1. irb (main): 001 : 0 > Kernel .send: print , 'hello world'
2. hello world => nil

method_added - this method is triggered at the moment when a new method is added to the class, starting from where you described it, i.e. if after method_added there are some other methods of yours, then he will catch them too.

So, all together, method_missing, allows us to catch non-existing or inaccessible class methods, to make real-life class methods that inherit this black magic from the base class, we use method_added, which registers the addition of new methods and hides them from external access through the private method thus ensures that they fall into method_missing.

In which, you can wrap them in any additional logic, without touching the class you are working on, without changing the program code in which the proxied class is called.