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Text
the language.
download the koans
*nix windows
* introduction
* the structure
* installing ruby
* what editors can i use? * the path to enlightenment* contact
* license
* inspiration
* other resources
Brought to you by EdgecaseTHE STRUCTURE
The koans are broken out into areas by file, hashes are covered in about_hashes.rb, modules are introduced in about_modules.rb, etc. They are presented in order in the path_to_enlightenment.rb file. Each koan builds up your knowledge of Ruby and builds upon itself. It will stop at the first place you need to correct. Some koans simply need to have the correct answer substituted for an incorrect one. Some, however, require you to supply your own answer. If you see the method __ (a double underscore) listed, it is a hint to you to supply your own code in order to make it work correctly.INSTALLING RUBY
These instructions are for *nix platforms. We also have Windowsinstructions .
In order to run the koans you need Ruby installed. If you do not already have Ruby setup, please visit http://ruby-lang.org/en/downloads for operating system specificinstructions.
To verify your installation, in your terminal window simply type:$ ruby --version
Any response for Ruby with a version number greater than 1.8 is fine. WHAT EDITORS CAN I USE? These instructions are for *nix platforms. We also have Windowsinstructions .
You can really use any editor you'd like, but here are somesuggestions:
* VSCode
* Emacs
* RubyMine
* Vim
* TextMate
THE PATH TO ENLIGHTENMENT These instructions are for *nix platforms. We also have Windowsinstructions .
You can run the tests by calling the path_to_enlightenment.rb file. In your terminal, while in the ruby_koans directory, type: $ ruby path_to_enlightenment.rb RED, GREEN, REFACTOR In test-driven development (TDD) the mantra has always been red: write a failing test and run it, green: make the test pass, and refactor: look at the code and see if you can make it any better. With the koans, you will need to run the tests and see it fail (red), make the test pass (green), then take a moment and reflect upon the test to see what it is teaching you and improve the code to better communicate its intent (refactor). The very first time you run it you will see the following output: $ ruby path_to_enlightenment.rb (in /Users/person/dev/ruby_koans)cd koans
Thinking AboutAsserts test_assert_truth has damaged your karma. You have not yet reached enlightenment ...for the error:
Please meditate on the following code: ./about_asserts.rb:10:in `test_assert_truth' path_to_enlightenment.rb:27 You then open up the about_asserts.rb file in your text editor andlook at line 10:
# We shall contemplate truth by testing reality, via asserts. def test_assert_truth assert false # This should be trueend
You then change false to true and run the tests again. You should geta new error.
Before moving on, think about what you are learning. In this specific case, ignore everything except the method name (test_assert_truth) and the parts inside the method (everything before the end). The goal is for you to see that if you pass a value to the assert method, it will either ensure it is true and continue on, or fail if in fact the statement is false.CONTACT
contact@edgecase.comLICENSE
Ruby Koans is released under a Creative Commons, Attribution-NonCommercial-ShareAlike License. @jimweirich
INSPIRATION
A special thanks to Mike Clark and Ara Howard for inspiring this project. Mike Clark wrote an excellent blog post about learning Ruby through unit testing. This sparked an idea that has taken a bit to solidify, that of bringing new rubyists into the community through testing. Ara Howard then gave us the idea for the Koans in his ruby quiz entry on Meta Koans (a must for any rubyist wanting to improve their skills). Also, "The Little Lisper" taught us all the value of the short questions/simple answers style of learning.Mike Clark's post
https://pragmaticstudio.com/blog/2005/03/18/ruby-learning-test-1-are-you-there-world Meta Koans rubyquiz.com/quiz67.htmlThe Little Lisper
amazon.com/Little-LISPer-Third-Daniel-Friedman/dp/0023397632 Coda - the Ruby Koans were principally the work of ( Jim Weirich) while working at
EdgeCase. Jim was an incredible influence in the Ruby community and beyond. And as good as he was as a developer, he was an even better human being. Jim sadly passed away in 2014. We all still miss him terribly and maintain this site in his honor.OTHER RESOURCES
Edgecase Ruby Koans on Github github.com/edgecase/ruby_koans The Ruby Language ruby-lang.org Try Ruby in your browser ruby.github.io/TryRuby Dave Thomas' introduction to Ruby Programming pragprog.com/book/ruby4/programming-ruby-1-9-2-0 The Pragmatic Studio Ruby Programming Online Course pragmaticstudio.com/ruby Brian Marick's fantastic guide for beginners: Everyday Scripting with Ruby pragprog.com/titles/bmsft/everyday-scripting-with-ruby Mountains are merely mountainsDetails
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