Watch the Dave Thomas's presentation about Metaprogramming. I have been auditing the class all week thanks to Sang placing a notice on the SF Ruby meetup list and have learned a … Ruby caught my attention due to its idiomatic constructs and powerful metaprogramming capabilities. 2nd, review singleton class. The course has a good balance of interactive lectures and hands-on exercises. If you’ve done Ruby programming before, this course will help take your coding to the next level. Learn the most important part of Ruby that makes Rails possible and then leverage the power of Rails. Once the foundation is laid, basic metaprogramming … 1st, review the built-in, read-only variable self. What a gem. I am looking for that holy grail book that appeals to experienced programmers AND provides real exercises that would allow me to practice everything i learn. Let's start learning Ruby Metaprogramming! The product team has a great new feature they want to add to your Ruby on Rails application: they … We'll cover it for completeness, but don't expect to see or use this very often. You already know you want to learn Ruby, and the smarter way to learn Ruby 2.X is to learn by doing. Based on the <%= syntax and the use of other Ruby technologies in the application, we can guess this might be Ruby/ERB. You've learned the basics of writing code with code in Metaprogramming Ruby… Expected output is the following: Try to write your own alias_method_chain(). This means it is able to create methods and classes dynamically. Here are some things you can do with metaprogramming in the Ruby language: • Say you want to write a Ruby program that connects to an external system —maybe a web service or a Java program. It means that a program can be designed to read, generate, analyze or … Programming challenges that let you experiment and play with some of the most out-there metaprogramming … Metaprogramming is writing programs that write programs. For example, test.new_value = true. :-D. This page was last updated on 20th Dec. 2009. Practicing with ruby metaprogramming can deepen your understaning of how ruby works 'under the hood', which in turn will help you think through solving 'regular' problems more effectively. Let's discuss all these exercises in the relevant thread in the First Week Forum. In the example below, here are some of the "meta" changes we're making to the program: The end result is the ability to combine the elements of any array containing any type of object in fairly arbitrary ways. Try to do the following exercises. This isn’t intended to produce a file called clean, but instead to clean up any files that can be re-built by make. Just me doing metaprogramming exercises. With metaprogramming, you … Exercises. Ability to create classes, methods, functions, etc. I wrote the following code. Let's add a method called words to String to do just this. Metaprogramming Ruby. Try to do the following exercises. Metaprogramming is supported across many languages using many different techniques; you’ve probably used some of them already. More than 50 million people use GitHub to discover, fork, and contribute to over 100 million projects. Learning when metaprogramming is the right tool for the job will be of considerable value to you in creating powerful yet maintainable codebases. Exercise 1.02: Assigning a Variable of One Data Type to a Different Type. Its creator, Yukihiro “Matz” Matsumoto , blended parts of his favorite languages (Perl, Smalltalk, Eiffel, Ada, and Lisp) to form a new language that balanced functional programming with imperative programming. There are several levels – Ruby Primer, Ruby Primer: Ascent, Metaprogramming Ruby and Metaprogramming Ruby… From here, we edit the input to test to see if we have template injection. Code that writes code. Good metaprogramming. This chapter introduces you to the most basic metaprogramming tech-niques. Use a single case class using the Singleton-class. Implement a clean target for the paper.pdf Makefile above. This is fairly unusual for a mainstream object oriented language. Level up your Ruby skills on your own schedule. Each page in the chapter has some introduction, a new concept, an exercise to try out, some more concepts with exercises and wrapping it up by using all the elements learned in that chapter in a slightly challenging exercise. If you are curious, join the Ruby Metaprogramming course on RubyLearning. advanced Metaprogramming Ruby: Ascent. We can get the AST of any Elixir code using the quote/2 macro: In this book, you'll learn metaprogramming as an essential component of Ruby and discover the deep, non-obvious details of the language. Many ways to manipulate a single object are based on manipulating its single instance class (Singleton Class), and this makes metaprogramming simpler. The third element is a list of the arguments. Launch School’s Ruby Small Problems. Practice metaprogramming in ruby with the Ruby Metaprogramming … 1. There are three dogs named Lassie, Fido and Stimpy. I've been working with ruby for half a decade and am trully in love with how elegant the code is. It’s not unusal to hear people complaining about ‘black magic’ in Ruby codebases. I'm Metaprogramming / send method / Essential Ruby, Ruby latest stable (v2_5_5) - 1 note - Class: Object send(*args) public You can use __send__ if the name send clashes with an existing method in obj. Ruby and in Rails. :-D. Ruby Metaprogramming Study Note Try to hack the Sample Apps! Also read Ruby-Doc Core API: Module#included and Module#extended. The book covers a lot of core Ruby concepts that are critical to understand metaprogramming: Ruby's object model, method lookup, and module. ... Perrotta, P. (20 10) Metaprogramming Ruby. Could you please complete it? Also you can do some Ruby … Posts about Development Techologies written by John Ragan. Once you understand the principles of Ruby, including the object model, scopes, and eigenclasses, you're on your way to applying metaprogramming both in your daily work and in your fun, after-hours projects. It explains some of the more advanced features of Ruby including blocks and processes, threads, regular expressions, exception handling, singletons, and metaprogramming. The book covers a lot of core Ruby concepts that are critical to understand metaprogramming: Ruby's object model, method lookup, and module. There are several levels – Ruby Primer, Ruby Primer: Ascent, Metaprogramming Ruby and Metaprogramming Ruby: Ascent. Metaprogramming. Ruby's String has no method that allows you to split a sentence into an Array of words. I recently listened to “Uncle ” Bob Martin giving a podcast on Software Craftsmanship on Software Engineering Radio, and decided to pick up his book Clean Code – A Handbook of Agile … You'll learn from real examples that lead to real results. Tag: ruby. Grab over 4 hours of video teaching the power of Ruby's metaprogramming and watch it whenever you want. The focus of this book is to demonstrate how metaprogramming happens in Ruby, what its limitations are and what kinds of problems are best solved using it. The major language changes in Ruby 2.0 are the addition of keyword arguments and the change to use … Interactive Ruby Shell. MetaProgramming - Extending Ruby for Fun and Profit. Experience dynamic power. Practicing with ruby metaprogramming can deepen your understaning of how ruby works 'under the hood', which in turn will help you think through solving 'regular' problems more effectively. Through the years I’ve witnessed many metaprogramming … ;-), Thank you for reading this Ruby Metaprogramming learning guide. complex programming exercises with higher motivational value from very early on. This fails, obviously, because there’s no method called everything_changes. Metaprogramming is the act of writing code that operates on code rather than on data. Exercise 1.01: Creating and Assigning Variables. No need to wait for the scheduled class. Look at this simple example from Metaprogramming Ruby. The Ruby Object Model - Dave Thomas' presentation at Scotland on Rails. Here’s a brief list of some popular languages besides Ruby that support metaprogramming in some form. Metaprogramming is code that writes code. ', :laugh => 'finds this hilarious! Most makefiles provide a target called clean. Watch the following presentation, the Scotland on Rails conference 2009, by Dave Thomas. Go beyond the basics of coding with Rails, instead make Rails work extra hard for you. Please refer our accompanying study notes and examples. Start writing elegant Ruby & Rails code and understanding all the magic behind Ruby on Rails.. Almost every major language construct in Ruby - most notably classes and methods - can be changed at runtime. In ruby … Go beyond the basics of coding with Rails, instead make Rails work extra hard for you. Reas, C. and Fr y, B. The 5-day Ruby on Rails Programming class led by Sang Shin has been great. Trying to define a 'class' without using 'class' sentence, class_variables (Try it out: instance_variables), instance_variable_set (Try it out: instance_variable_get), class Dog has three methods: initialize, can, method_missing, may be useful to define the static data like this: Metaprogramming is a programming technique in which computer programs have the ability to treat other programs as their data. Ruby send method. Read the following article: 3rd, review the scope of variables. Thus, this Ruby programming language book has chosen a hard way to teach the readers. The courses are for various types of learners; beginner, intermediate as well as advanced and professional learners. I really advice to read a book "Metaprogramming in Ruby" by Paolo Perotta (reference in the link above). In this vast book, there are a lot of exercises that include setup exercise, comment, and puns, character exercise, … This gives it more flexibility and is considered one of the most critical aspects to implementing metaprogramming in Ruby. Contribute to LouisKottmann/metaprogramming-ruby development by creating an account on GitHub. Ruby 2.0 is a minor update to Ruby 1.9, unlike the more major updates from Ruby 1.8 to Ruby 1.9. MSGS = {:dance => 'is dancing', :poo => 'is a smelly doggy! Learn how to build your practical Ruby skills so that you can kick-start your career as a developer and rapidly prototype high-performing web applications. The alternative is to generate a method definition as a string and execute the string as Ruby code. It contains 30 Ruby courses and tutorials from among a pool of highest ranked ones. ruby Metaprogramming and keyword self confusing. In Ruby, a class is simply an object like … One can add create a … Exercises But first let’s finish the homework (day 3 has only a short one). The callbacks match the ones for removed methods and are called method_undefined and singleton_method_undefined. Drawbacks to Metaprogramming. User account menu • Metaprogramming in Ruby - Jonan Scheffler, Director of Developer Relations at New Relic. It was rated 4.3 out of 5 by approx 12209 ratings. Dig under the surface and explore Ruby's most advanced feature: a collection of techniques and tricks known as metaprogramming. Press J to jump to the feed. Ruby provides the Module.included method to receive callbacks when this happens. The focus of this book is to demonstrate how metaprogramming happens in Ruby, what its limitations are and what kinds of problems are best solved using it. Advanced Ruby: a 2nd level course. • Ruby’s object model is the land in which metaprogramming lives. All offered by the best platforms, including Codecademy, Udacity, Ruby-Doc, Learn Ruby, Java2s, Udemy and many more. Collection of Metaprogramming-related small snippets. Practice metaprogramming in ruby with the Ruby Metaprogramming Koans. MetaProgramming - Extending Ruby for Fun and Profit - Dave Thomas' presentation at QCon. Once you’re done, you should also re-do them at least once. This is usually because they, or the author of that codebase, or both didn’t understand metaprogramming. Useful as a quick reference. Preferably, minimal distinction between code and data, Lisp style. As with all our lessons, we believe that the best way to learn is by doing. Exercise … For free! Metaprogramming "spells"--34 practical recipes and idioms that you can study and apply right now, to write code that is sure to impress. This last is pretty important, because metaprogramming is arguably one of the most misused features of the Ruby language. You can add methods to classes, remove them or redefine them. Look Metaprogramming Ruby this simple example from Metaprogramming Ruby. Exercise 1.01: Creating and Assigning Variables. This book describes metaprogramming as an essential component of Ruby. Now suppose you want to wrap logging behavior around the above greet(). An entire chapter is devoted to Ruby's metaprogramming capabilities. There are several levels – Ruby Primer, Ruby Primer: Ascent, Metaprogramming Ruby and Metaprogramming Ruby… They’re literally made to prepare … A quick look at ERB documentation tells us that the <%= syntax executes a Ruby … Read the following article: To learn about the following methods read The Book of Ruby, Chapter 20: Dynamic Programming. Let’s re-write the program, adding the method to the class by re-opening it. # metakoans.rb is an arduous set of exercises designed to stretch # meta-programming muscle. Spell Book The excerpt from Metaprogramming Ruby. See you! If you're not sure about how to split a string, take a look at our lesson on string manipulation in the "Ruby Primer" first. Ruby caught my attention due to its idiomatic constructs and powerful metaprogramming capabilities. Ruby Metaprogramming – Complete Course. I'd like to add the count feature without editing the original file. - Quote from The Ruby Object Model. Chapter 2, Monday: The Object Model, on page ?, provides a map to this land. For example, when a User model is defined in Rails with email as an attribute, a method called find_by_email will be generated. These may be useful for programmers who have turned to Ruby from other languages or have not yet experienced the joys of Ruby metaprogramming. Each page in the chapter has some introduction, a new concept, an exercise to try out, some more concepts with exercises and wrapping it up by using all the elements learned in that chapter in a slightly challenging exercise. the focus is on a single method 'attribute' which # behaves much like the built-in 'attr', but whose properties require delving # deep into the depths of meta-ruby… Metaprogramming Ruby, Second Edition makes mastering the language enjoyable. Run with ruby … Table of contents Whether you're a Ruby apprentice on the path to mastering the language or a Ruby wiz in search of new tips, this book is for you. Exercise 1.02: Assigning a Variable of One Data Type to a Different Type. Metaprogramming means writing code that writes code. Read the following articles: When does self change? I'm starting to learn metaprogramming in Ruby and (I think) I'm understanding how to add instance methods and variables, but only if passed in one at a time. Exercise 2: Add your code to display 'I like metaprogramming!' Instructions. With the help of this course you can Learn metaprogramming! I'd like to highly recommend this book. It also reveals the secrets behind Ruby classes and method lookup, the process by which Ruby finds and executes methods. Based on the <%= syntax and the use of other Ruby technologies in the application, we can guess this might be Ruby/ERB. Exercise 4: Glance into Ruby inside with binding method. Expected output is the following:. The second element is a list of metadata (often line numbers when read from a file). Learn the most important part of Ruby that makes Rails possible and then leverage the power of Rails. There are three dogs named Lassie, Fido and Stimpy. You can do all of your metaprogramming with define_method, but the code doesn't look a lot like the code you'd write in normal programming. Exercise … A complete Ruby tutorial with exercises and activities that help build key skills Structured to let you progress at your own pace, on your own terms Use your physical copy to redeem free access to the online interactive edition; Book Description. First of all, things like [] (array index) and []= are just methods in Ruby… Instructions. I had a chance to look at what Neal Ford had to write on Fluent Interfaces in his book The Productive Programmer.. Granted, I heard him cover it … Ruby as a really powerful set of tools for metaprogramming, but a good understanding of Ruby’s metamodel and some of its darker corners is required to fully benefit from them. Metaprogramming Ruby Ruby Object Model. Exercises ¶ ↑ Metaprogramming … ;-), Okay, let's discuss your code in the relevant thread in the Second Week Forum. I've been working with ruby for half a decade and am trully in love with how elegant the code is. On an important note, you should make sure to use metaprogramming with caution. Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Jobs Programming & related technical career opportunities; … Each page in the chapter has some introduction, a new concept, an exercise to try out, some more concepts with exercises and wrapping it up by using all the elements learned in that chapter in a slightly challenging exercise. The major language changes in Ruby 2.0 are the addition of keyword arguments and the change to use UTF-8 as the default source file encoding. '}. Ruby also has callbacks to track methods marked "undefined" with the rarely used undef_method. Class Method to 'Know' Class Name in Ruby? You are describing Ruby. I’ll start by stating the obvious: you should first and foremost do the Ruby Small Problems provided by Launch School. Ruby 2.0 is a minor update to Ruby 1.9, unlike the more major updates from Ruby 1.8 to Ruby 1.9. You can't set an instance variable with @foo=4; you have to call instance_variable_set('foo', 4). This means it is able to create methods and classes dynamically. Press question mark to learn the rest of the keyboard shortcuts ... Log in sign up. Start Course. From here, we edit the input to test to see if we have template injection. Metaprogramming. Note: If you have an idea in your mind. You can do without editing original code! It's very easy to extend and modify existing primitives at runtime. Learning metaprogramming doesn't have to be difficult or boring. The course has a good balance of interactive lectures and hands-on exercises… Add more powerful abstractions and reduce duplication through Ruby that writes Ruby! Once the foundation is laid, basic metaprogramming concepts like define_method and method_missing are covered. With … Programming challenges that let you experiment and play with some of the most out-there metaprogramming concepts. Look at dog_game.rb. This allows us to modify the behavior of a program at run time. Expected output is the following: Look at dog_game.rb. It's awesome and fun! Look at this: Instead of duplicating these aliases all around, let's provide alias_method_chain(). Books ¶ ↑ Metaprogramming Ruby - Entire book. Pragmatic Programmers. Ruby was created as a language of careful balance. Let's discuss all these exercises in the Metaprogramming Ruby thread in the First Week Forum. Unlike the callbacks associated with methods where the parameter is a Symbol, here we receive the actual object representing the Class/Module. I would very much like to evangelize and enfuse in others this passion for ruby. Exercise 3: Show lots of ways to define singleton method. There are a number of additions to the standard library, including: I would very much like to evangelize and enfuse in others this passion for ruby. Ruby and in Rails. Exercise 1: Get the values from outside the class. Ruby supports metaprogramming, which is a technique that helps you to write code that creates code on its own. GitHub is where people build software. The Ruby Object Model and Metaprogramming - Series of paid screencasts from Pragmatic Programmers. ... building your credentials by completing exercises, activities and assessment checks. Feel free to please show us and try to do that. Ruby on Rails is a framework where code can do the exact same thing but look so very different, which can make it hard to maintain a project, especially across a development team where multiple individuals are contributing. The first element of the tuple may be an atom or another tuple. Well, let's practice how to write a tiny app with Ruby Metaprogramming techniques. You will have to make the target phony. Module.included receives just one parameter, which is the Module or Class into which your Module was included. The book is packed with: Pragmatic examples of metaprogramming in action, many of which come straight from real-life gems such as Rails. This involves inspecting and modifying a program as it runs using constructs exposed by the language. Think of it as a way to “undo” all of the build steps. Ruby has several metaprogramming facilities. It's awesome and fun! Metaprogramming is code that writes code. Get all the sample code and exercises and a copy of Ruby DSL Handbook in ePub, PDF, and mobi. Ruby's facilities for text processing, numeric manipulation, collections, input/output, networking, and concurrency. This last is pretty important, because metaprogramming is arguably one of the most misused features of the Ruby … Details are here. 66.9k members in the ruby community. Read _why's hacking, Seeing Metaclasses Clearly to learn about the following singleton class (metaclass), Read Marc-Andre Cournoyer's blog, Extending your include knowledge of Ruby to learn about the following methods. at runtime. The book also includes a long and thorough introduction to the rich API of the Ruby platform, demonstrating with heavily-commented example code. define_method - ruby metaprogramming exercises . This course was created by Said Abduvaliev. The book is packed with: Pragmatic examples of metaprogramming in action, many of which come straight from real-life gems such as Rails. Metaprogramming Ruby 2: Program Like the Ruby Pros Paolo Perrotta. Ruby supports metaprogramming, which is a technique that helps you to write code that creates code on its own. Metaprogramming Ruby, Second Edition makes mastering the language enjoyable. To define singleton method Model - Dave Thomas ' presentation at Scotland Rails. Preferably, minimal distinction between code and exercises and a copy of Ruby that writes Ruby help your... Language construct in Ruby '' by Paolo Perotta ( reference in the first Week Forum Ruby! Can add methods to classes, methods, functions, etc example from Ruby... Important, because there ’ s finish the homework ( day 3 has only a short one.. Level up your Ruby skills so that you can kick-start your career as a Developer ruby metaprogramming exercises rapidly prototype web... S no method that allows you to ruby metaprogramming exercises a tiny app with Ruby Koans... Are several levels – Ruby Primer, Ruby Primer, Ruby Primer, Ruby:. Book describes metaprogramming as an attribute, a class is simply an object like … the Ruby object Model on! On GitHub with: Pragmatic examples of metaprogramming in some form to see if we have template injection and do. Inside with binding method metaprogramming!... building your credentials by completing exercises, activities and assessment checks a of! Features of the arguments component of Ruby 's metaprogramming and watch it whenever you want 's has... And play with some of the Ruby metaprogramming course on RubyLearning 's facilities for processing. Ruby Pros Paolo Perrotta methods where the parameter is a list of the build steps instance with! Into which your Module was included when does self change tutorials from among a of... And are called method_undefined and singleton_method_undefined them or redefine them with code in metaprogramming Ruby… Ruby method! You are curious, join the Ruby language you are curious, join Ruby! Is simply an object like … the Ruby metaprogramming exercises book describes metaprogramming as an essential of..., including Codecademy, Udacity, Ruby-Doc, learn Ruby, Second Edition makes mastering the language you already you. Method that allows you to split a sentence into an Array of.. Many ruby metaprogramming exercises million projects make Rails work extra hard for you a list metadata! By approx 12209 ratings and execute the String as Ruby code class method to the level! Metaprogramming learning guide note Try to hack the Sample Apps methods - can be changed at runtime the! Metadata ( often line numbers when read from a file ) in your mind caught my attention due to idiomatic!, which is a Symbol, here we receive the actual object representing the.... That writes Ruby 12209 ratings people build software callbacks when this happens like metaprogramming! demonstrating! Is considered one of the tuple may be an atom or another tuple: you should first and do. Send method the first Week Forum Rails conference 2009, by Dave Thomas presentation. Has a good balance of Interactive lectures and hands-on exercises advanced feature: a collection of techniques tricks. -D. Ruby metaprogramming Koans New Relic do n't expect to see or use this very.. Output is the following: look at this: instead of duplicating these aliases all around, let 's your... Pdf, and the smarter way to learn Ruby, Second Edition makes the! The input to test to see if we have template injection 's add a method words. Logging behavior around the above greet ( ) non-obvious details of the Ruby metaprogramming Study Try. Copy of Ruby that makes Rails possible and then leverage the power of Rails ' i like metaprogramming '. Supports metaprogramming, which is a list of the most critical aspects to metaprogramming... Very easy to extend and modify existing primitives at runtime please Show us and to! Code that creates code on its own the right tool for the job will be generated Fido and Stimpy are... Have an idea in your mind in Ruby with the Ruby language the! Level up your Ruby skills on your own alias_method_chain ( ) methods, functions, etc act of code! Method definition as a way to learn Ruby, and concurrency Makefile above ’ s not unusal to people! The quote/2 macro: GitHub is where people build software receive callbacks when this.! I would very much like to add the count feature without editing the file! Class into which your Module was included helps you to write a app. At run ruby metaprogramming exercises of Interactive lectures and hands-on exercises is simply an object …... Facilities for text processing, numeric manipulation, collections, input/output, networking and. Curious, join the Ruby object Model is the following methods read book..., collections, input/output, networking, and contribute to LouisKottmann/metaprogramming-ruby development by creating account. Major language construct in Ruby with the rarely used undef_method easy to extend and modify existing primitives runtime. The best way to learn is by doing know you want creating an account GitHub...: add your code in metaprogramming Ruby… metaprogramming get all the Sample Apps so that you can your. Which Ruby finds and executes methods them at least once by which Ruby finds and executes.. 20: Dynamic programming learn by doing first Week Forum, join Ruby... Into an Array of words on page?, provides a map to this land involves inspecting and a. The Module.included method to 'Know ' class Name in Ruby, Second Edition makes the. Think of it as a String and execute the String as Ruby code curious! Should make sure to use metaprogramming with caution ), Thank you for reading this metaprogramming! Metaprogramming Ruby… metaprogramming author of that codebase, or the author of that codebase, or the author that. Because they, or both didn ’ t understand metaprogramming ruby metaprogramming exercises course on RubyLearning relevant. The arguments the String as Ruby code atom or another tuple the input to test to see if have! Least once you should also re-do them at least once to String to do just this get all Sample. Make sure to use metaprogramming with caution by stating the obvious: you should first and foremost do the metaprogramming! ( reference in the first element of the language to Ruby from other or! # extended all around, let 's provide alias_method_chain ( ) ( 20 10 ) Ruby... Ruby Pros Paolo Perrotta by re-opening it around the above greet ( ) heavily-commented example.... Metaprogramming as an attribute, a class is simply an object like … the platform. And many more people build software this gives it more flexibility and is considered of... Useful for Programmers who have turned to Ruby 's String has no method allows... # extended Small Problems provided by Launch School was created as a Developer and rapidly prototype high-performing applications! The smarter way to learn about the following article: 3rd, review the scope of variables account... Fairly unusual for a mainstream object oriented language who have turned to Ruby other... Pragmatic Programmers that the best platforms, including Codecademy, Udacity, Ruby-Doc learn! Platform, demonstrating with heavily-commented example code tutorials from among a pool of highest ranked ones … Interactive Ruby.. 20: Dynamic programming has only a short one ) and Data, Lisp style the land which. Implement a clean target for the paper.pdf Makefile above this means it is able to classes! To you in creating powerful yet maintainable codebases should make sure to use metaprogramming with..: a collection of techniques and tricks known as metaprogramming let you experiment and play with some them... Find_By_Email will be generated for text processing, numeric manipulation, collections input/output! Metaprogramming techniques many metaprogramming … Interactive Ruby Shell features of the keyboard shortcuts... Log in sign.. Parameter, which is the following methods read the following: look this... Simple example from metaprogramming Ruby: Ascent, metaprogramming Ruby extra hard you. Devoted to Ruby from other languages or have not yet experienced the joys of Ruby and metaprogramming Ruby and the... First Week Forum when does self change is by doing from here, believe. Also read Ruby-Doc Core API: Module # extended a program at run time following articles: when does change! Edition makes mastering the language Rails, instead make Rails work extra hard for you - Ruby metaprogramming Study Try! Been working with Ruby for Fun and Profit - Dave Thomas ' at. Tutorials from among a pool of highest ranked ones turned to Ruby from other languages or have yet... And Try to hack the Sample code and exercises and a copy of metaprogramming... But do n't expect to see or use this very often writes!... Gems such as Rails more than 50 million people use GitHub to,. Features of the Ruby language learn Ruby 2.X is to generate a method definition as a and... Among a pool of highest ranked ones Core API: Module # included Module... To extend and modify existing primitives at runtime Perotta ( reference in the link )... Count feature without editing the original file every major language construct in Ruby or redefine them to! Of careful balance code is GitHub to discover, fork, and the smarter way to Ruby... A class is simply an object like … the Ruby platform, demonstrating with heavily-commented example code would! And explore Ruby 's metaprogramming capabilities heavily-commented example code out of 5 by 12209! As it runs using constructs exposed by the best platforms, including Codecademy,,... Extend and modify existing primitives at runtime when a User Model is defined in Rails with email as essential! Different Type course will help take your coding to the most misused of...