Downloaded 13 times
![User.find params[:id], :limit => 10, :order => “name”](https://image.slidesharecdn.com/rubyisanacceptablelisp-130211065031-phpapp01/75/Ruby-is-an-Acceptable-Lisp-32-2048.jpg)
![# ruby [1,2,3].map {|n| n*n }.reject {|n| n%3==1 } ; lisp (remove-if (lambda (n) (= (mod n 3) 1)) (mapcar (lambda (n) (* n n)) '(1 2 3)))](https://image.slidesharecdn.com/rubyisanacceptablelisp-130211065031-phpapp01/75/Ruby-is-an-Acceptable-Lisp-51-2048.jpg)
Uploaded byAstrails
Ruby is an Acceptable Lisp
The document discusses the programming language Ruby, highlighting its historical background, features, and comparisons to Lisp and other languages. It emphasizes Ruby's clean syntax, object-oriented nature, and powerful libraries, while also mentioning testing methodologies in the Ruby community. Additionally, it touches upon the importance of community and adaptability in the evolution of programming languages.
Ruby is an Acceptable Lisp
- 1. Ruby is an acceptableLisp Vitaly Kushner astrails.com
- 2. Ruby is better then Lisp
- 3. Ruby is better then Lisp sometimes* ;-)
- 4.
- 5.
- 6.
- 7.
- 8. Blub Language Paradox Paul Graham http://paulgraham.com/avg.html
- 9. Is Lisp themost powerful?
- 10.
- 11.
- 13.
- 14.
- 15. • syntax • linguisticpower • domain
- 16. • syntax • linguisticpower • domain • libraries
- 17. • syntax • linguisticpower • domain • libraries • community
- 18.
- 19.
- 20. History • Yukihiro Matsumoto(aka "Matz")
- 21. History • Yukihiro Matsumoto(aka "Matz") • Released in 1994
- 22. History • Yukihiro Matsumoto(aka "Matz") • Released in 1994 • Got known in US about 2000
- 23. History • Yukihiro Matsumoto(aka "Matz") • Released in 1994 • Got known in US about 2000 • Gained momentum around 2003-2005
- 24. more powerful than Perl more object-oriented than Python.
- 25. Perl Smalltalk Eiffel Ada Lisp
- 26. • Simple consistentsyntax • Dynamically typed • Late binding • Single Inheritance with Mixin support
- 27. • Everything isan object • Closures • Garbage Collection • Multi platform
- 28.
- 29.
- 30. var # variable $var# global variable @var # instance variable @@var # class variable CONST # constant Class # class
- 31. attrs = { :src => "foo.img", :width => 100, :height => 200, :class => Avatar }
- 32. User.find params[:id], :limit=> 10, :order => “name”
- 33. if @project.owned_by?(@user) return false unless @user.admin? end @project.complete!
- 34.
- 35.
- 36. def x_times(x, fun) for i in 1..x fun.call(i) end end x_times(10, lambda {|x| puts x})
- 37. def x_times(x) for i in 1..x yield i end end x_times(10) {|x| puts x}
- 38. def x_times(x) for i in 1..x yield i end end x_times(10) do |x| puts x end
- 39. Everything is anObject that you can extend
- 40. class Fixnum def x_times for i in 1..self yield i end end end 5.x_times { |x| puts x }
- 41. 5.times { |x|puts x }
- 42. map {|x| ...} collect {|x| ...} select {|x| ...} reject {|x| ...} find {|x| ...} any? {|x| ...} all? {|x| ...} sort {|a, b| ...}
- 43.
- 44. 10.months.from_now => Thu Aug12 03:25:40 0300 2010
- 45. 5.minutes.ago => Mon Oct12 03:21:02 0200 2009
- 46.
- 47. def incrementor(increment) proc {|x| x + increment} end >> i5 = incrementor(5) => #<Proc:0x01874a78@(irb):46> >> i5.call(3) => 8
- 48.
- 49. # ruby def paidMore(amount) proc {|e| e.salary > amount} end // C# public Predicate<Employee> PaidMore(int amount) { return delegate(Employee e) { return e.Salary > amount; } }
- 50. // ruby def foo(n)lambda {|i| n+=i} end ; lisp (defun foo (n) (lambda (i) (incf n i)))
- 51. # ruby [1,2,3].map {|n|n*n }.reject {|n| n%3==1 } ; lisp (remove-if (lambda (n) (= (mod n 3) 1)) (mapcar (lambda (n) (* n n)) '(1 2 3)))
- 52.
- 53. Ruby fakes macros pretty well
- 54. OO + Monkey Patching
- 55. class Person def self.defsay(sound) define_method("say_#{sound}") do puts sound end end defsay :hello defsay :hi end
- 56. >> bob =Person.new => #<Person:0x185cba8> >> bob.say_hello hello => nil >> bob.say_hi hi => nil
- 57. class Plugin <ActiveRecord::Base validates_presence_of :name validates_presence_of :description validates_presence_of :author_id belongs_to :author, :class_name => "User" has_many :plugin_versions, :dependent => :destroy belongs_to :default_version, :class_name => "PluginVersion" acts_as_commentable acts_as_taggable ... end
- 58.
- 59.
- 60.
- 61. User.find_by_name_and_company( "Vitaly Kushner", "Astrails")
- 62.
- 63. require 'pp' require 'parse_tree' require'parse_tree_extensions' def print_ast(&block) pp block.to_sexp end
- 64. print_ast do puts"hello" end s(:iter, s(:call, nil, :proc, s(:arglist)), nil, s(:call, nil, :puts, s(:arglist, s(:str, "hello"))))
- 65. Multiple inheritance is EVIL :-)
- 66.
- 67. module FlyHome def set_home @home = position end def fly_home fly(@home) end end
- 68. class Bird <Living include FlyHome def fly(direction) ... def position ... end class Airplane < Machine include FlyHome def fly(direction) ... def position ... end
- 69.
- 70.
- 71.
- 72.
- 73.
- 74.
- 75.
- 76.
- 77.
- 78.
- 79.
- 80.
- 81.
- 82. TATFT Test All TheFucking Time
- 83. • Test::Unit • RSpec •Shoulda • Cucumber • Webrat
- 84. it "should beable to show media" do @media = stub_media Media.stub!(:find).and_return(@media) get :show, :id => @media.id response.should be_success end
- 85. Ruby is Better then Lisp Q &A Vitaly Kushner astrails.com @astrails @vkushner